3456x4608pxuntitled, Naval, Run, untitled, Pennsylvania, Lycoming County, Tiadaghton State Forest, Black Forest Trail, Wilds, hiking, creek, stream, waterfall, cascades, trees, coniferous, eastern hemlocks, moss, rocks, ravine, winter, creative commons, nature, river, forest, water, tree, rock - Object, outdoors, freshness, landscape, green Color, scenics, beauty In Nature, flowing Water, HD wallpaper
1920x1080pxnature, rock, landscape, valley, mountain, canyon, water, sky, travel, tourism, stone, summer, geological formation, national, forest, park, river, mountains, natural depression, sea, ravine, coast, outdoor, hill, tree, lake, scenery, scenic, environment, natural, rocks, clouds, outdoors, vacation, wilderness, cliff, ocean, wild, material, trees, HD wallpaper
1920x1080pxnature, waterfall, spring, landscape, river, water, rock, valley, stream, mountain, forest, travel, stone, natural, park, environment, creek, scenic, tree, outdoors, sky, geological formation, natural depression, summer, cascade, national, outdoor, dam, fall, rocks, falls, trees, slope, tourism, wild, canyon, geyser, flow, barrier, mountains, HD wallpaper
5184x3456pxorange sunset in landscape photography, Orange Sky, sunset, landscape photography, BLM, Bureau of Land Management, NLCS, National, Conservation, System, Lands Department, Department of the Interior, Oregon, Washington, Wild and Scenic River, Wilderness Area, 50th Anniversary, Wilderness Act of 1964, Camping, Backpacking, America, Great Outdoors, Outside, Recreation, Hunting, Fishing, Hiking, Climbing, Solitude, Northwest Pacific, Pacific Northwest, natural resources, ecology, environment, Steens Mountain Wilderness, nature, scenics, dusk, cloud - Sky, sky, outdoors, beauty In Nature, landscape, cloudscape, HD wallpaper
5184x3456pxbrown mountain under blue sky, Trailhead, brown mountain, blue sky, BLM, Bureau of Land Management, NLCS, National, Landscape, Conservation, System, Lands Department, Department of the Interior, Oregon, Washington, Wild and Scenic River, Wilderness Area, 50th Anniversary, Wilderness Act of 1964, Camping, Backpacking, America, Great Outdoors, Outside, Recreation, Hunting, Fishing, Hiking, Climbing, Solitude, Northwest Pacific, Pacific Northwest, natural resources, ecology, environment, Spring Basin Wilderness, John Day, nature, mountain, outdoors, hill, sky, rural Scene, summer, HD wallpaper
2779x2064pxgreen mountains beside body of water under blue sky, Conical, green mountains, body of water, blue sky, Pennsylvania, Lycoming County, Pine Creek Gorge, Tiadaghton State Forest, Appalachian Mountains, Allegheny Plateau, Wilds, landscape, sky, clouds, cirrus, rural, summer, North America, Nature, creative commons, forest, outdoors, mountain, tree, blue, scenics, river, water, lake, HD wallpaper
5184x3456pxtrees at sunset, Sunrise, Branches, trees, sunset, BLM, Bureau of Land Management, NLCS, National, Landscape, Conservation, System, Lands Department, Department of the Interior, Oregon, Washington, Wild and Scenic River, Wilderness Area, 50th Anniversary, Wilderness Act of 1964, Camping, Backpacking, America, Great Outdoors, Outside, Recreation, Hunting, Fishing, Hiking, Climbing, Solitude, Northwest Pacific, Pacific Northwest, natural resources, ecology, environment, Juniper Dunes Wilderness, nature, silhouette, dusk, tree, sky, outdoors, back Lit, HD wallpaper
5184x3456pxphoto of sunset, Sisters, photo, sunset, BLM, Bureau of Land Management, NLCS, National, Landscape, Conservation, System, Lands Department, Department of the Interior, Oregon, Washington, Wild and Scenic River, Wilderness Area, 50th Anniversary, Wilderness Act of 1964, Camping, Backpacking, America, Great Outdoors, Outside, Recreation, Hunting, Fishing, Hiking, Climbing, Solitude, Northwest Pacific, Pacific Northwest, natural resources, ecology, environment Oregon, Oregon Badlands, Bend, nature, mountain, scenics, sky, sunrise - Dawn, outdoors, HD wallpaper
1920x1080pxnature, waterfall, river, water, landscape, rock, spring, stone, forest, environment, stream, mountain, tree, park, outdoor, travel, fall, scenic, natural, creek, rocks, summer, tourism, wild, cascade, falls, scenery, outdoors, lake, flowing, trees, valley, peaceful, splash, canyon, mountains, serene, flow, sky, stones, HD wallpaper
3840x2160pxwaterfall, nature, river, water, rock, stream, landscape, stone, forest, mountain, outdoor, environment, park, cascade, creek, fall, travel, tree, flowing, natural, wild, summer, splash, falls, spring, flow, rocks, scenery, waterfalls, peaceful, motion, wet, scenic, tourism, tranquil, outdoors, serene, ecology, fresh, moss, HD wallpaper
1920x1080pxwaterfall, nature, river, water, rock, stream, landscape, forest, stone, outdoor, mountain, environment, park, cascade, creek, travel, tree, natural, wild, fall, flowing, summer, spring, splash, falls, flow, rocks, motion, scenery, waterfalls, peaceful, wet, scenic, tourism, outdoors, ecology, tranquil, fresh, moss, serene, HD wallpaper
1920x1080pxnature, waterfall, river, water, landscape, valley, rock, forest, mountain, canyon, stone, stream, outdoor, park, travel, tree, fall, environment, wild, natural, spring, ravine, cascade, creek, natural depression, falls, rocks, flowing, summer, scenic, tourism, outdoors, scenery, flow, national, trees, peaceful, autumn, splash, wilderness, HD wallpaper
1920x1080pxwaterfall, nature, river, water, rock, valley, landscape, stream, forest, stone, mountain, park, cascade, outdoor, environment, fall, flowing, natural depression, creek, travel, tree, wild, falls, natural, flow, splash, canyon, summer, rocks, spring, motion, scenery, waterfalls, peaceful, outdoors, tourism, tranquil, wet, scenic, wilderness, HD wallpaper
1920x1080pxwaterfall, nature, river, stream, water, rock, forest, stone, landscape, park, cascade, environment, outdoor, mountain, creek, travel, flowing, wild, tree, natural, fall, falls, spring, splash, rocks, flow, wet, motion, waterfalls, summer, tourism, peaceful, fresh, outdoors, falling, ecology, scenery, moss, leaf, scenic, HD wallpaper
1920x1080pxwaterfall, nature, river, water, rock, stream, landscape, stone, forest, mountain, outdoor, environment, cascade, spring, park, fall, creek, travel, flowing, tree, natural, wild, falls, splash, summer, flow, rocks, waterfalls, scenery, peaceful, motion, wet, scenic, tourism, outdoors, tranquil, fresh, serene, wilderness, ecology, HD wallpaper
1920x1080pxnature, spring, landscape, water, waterfall, travel, sky, river, outdoor, environment, summer, park, rock, scenic, stream, tree, natural, mountain, stone, geyser, tourism, forest, clouds, cloud, outdoors, trees, ocean, sea, beach, falls, vacation, national, scenery, cloudy, wild, ecology, grass, coast, coastline, creek, HD wallpaper
5184x3456pxsilhouette tree, Sun, Snag, silhouette, tree, BLM, Bureau of Land Management, NLCS, National, Landscape, Conservation, System, Lands Department, Department of the Interior, Oregon, Washington, Wild and Scenic River, Wilderness Area, 50th Anniversary, Wilderness Act of 1964, Camping, Backpacking, America, Great Outdoors, Outside, Recreation, Hunting, Fishing, Hiking, Climbing, Solitude, Northwest Pacific, Pacific Northwest, natural resources, ecology, environment, Table Rock Wilderness, Rooster Rock, sunset, nature, sky, dusk, HD wallpaper
5184x3456pxsilhouette of mountain under body of water background during golden hour, Orange Sky, silhouette, mountain, body of water, background, golden hour, BLM, Bureau of Land Management, NLCS, National, Landscape, Conservation, System, Lands Department, Department of the Interior, Oregon, Washington, Wild and Scenic River, Wilderness Area, 50th Anniversary, Wilderness Act of 1964, Camping, Backpacking, America, Great Outdoors, Outside, Recreation, Hunting, Fishing, Hiking, Climbing, Solitude, Northwest Pacific, Pacific Northwest, natural resources, ecology, environment, Steens Mountain Wilderness, sunset, nature, scenics, dusk, sky, outdoors, cloud - Sky, sunrise - Dawn, HD wallpaper
2000x1333pxwater falls time lapse photo, oregon, deschutes, oregon, deschutes, Social Media, Takeover, August 15th, Bucket List, Oregon, Deschutes, Wild and Scenic River, water falls, time lapse, photo, BLM, Bureau of Land Management, lands, national monument, monument national, conservation area, Wilderness, river wild, national historic trail, urban, escape, day trip, roadtrip, waterfall, nature, river, stream, water, forest, rock - Object, outdoors, scenics, landscape, beauty In Nature, mountain, HD wallpaper
1920x1080pxnature, valley, waterfall, water, river, landscape, natural depression, mountain, rock, canyon, forest, stone, travel, stream, park, geological formation, rocks, summer, mountains, trees, tree, cascade, outdoors, natural, fall, outdoor, environment, ravine, scenic, flow, sky, hill, tourism, wild, flowing, lake, falls, national, scenery, creek, HD wallpaper
1920x1080pxnature, waterfall, river, landscape, rock, water, forest, valley, stream, mountain, stone, rocks, tree, summer, trees, travel, natural, park, environment, outdoor, natural depression, cascade, creek, scenic, lake, outdoors, mountains, fall, scenery, flow, flowing, tourism, peaceful, national, wild, hill, falls, geological formation, sky, serene, HD wallpaper
3000x1998pxsilhouette of person wearing cap standing near blue sea during daytime, washington, san juan islands national monument, washington, san juan islands national monument, Social Media, Takeover, August 15th, Bucket List, Washington, San Juan Islands National Monument, silhouette, person, cap, blue sea, daytime, BLM, Bureau of Land Management, lands, national monument, monument national, conservation area, Wilderness, river wild, wild and scenic river, national historic trail, urban, escape, day trip, roadtrip, sea, nature, beach, outdoors, people, sunset, men, hiking, HD wallpaper
5184x3456pxphoto of body of water beside trees, Callahan, Run, photo, body of water, trees, Pennsylvania, Lycoming County, Tiadaghton State Forest, Pine Creek Gorge, Big Pine, Black Forest Trail, Wilds, hiking, stream, creek, cascades waterfall, rocks, moss, forest, leaf litter, ravine, spring, creative commons, nature, waterfall, river, tree, leaf, autumn, outdoors, water, landscape, scenics, beauty In Nature, flowing Water, rock - Object, freshness, woodland, green Color, HD wallpaper
1920x1080pxnature, spring, waterfall, landscape, water, travel, river, geyser, outdoor, sky, environment, rock, park, summer, natural, scenic, stream, ocean, stone, mountain, tourism, tree, forest, outdoors, wild, sea, beach, HD wallpaper
1920x1080pxspring, nature, geyser, geological formation, landscape, water, mountain, environment, travel, river, volcano, park, sky, outdoor, rock, stream, natural, waterfall, forest, scenic, summer, stone, tree, wild, tourism, national, rocks, HD wallpaper
5184x3456pxaerial photography of bed of clouds during day time, Morning, aerial photography, bed of clouds, day, time, BLM, Bureau of Land Management, NLCS, National, Landscape, Conservation, System, Lands Department, Department of the Interior, Oregon, Washington, Wild and Scenic River, Wilderness Area, 50th Anniversary, Wilderness Act of 1964, Camping, Backpacking, America, Great Outdoors, Outside, Recreation, Hunting, Fishing, Hiking, Climbing, Solitude, Northwest Pacific, Pacific Northwest, natural resources, ecology, environment, Wild Rogue Wilderness, nature, sunset, mountain, scenics, outdoors, forest, sunrise - Dawn, HD wallpaper
1920x1080pxspring, nature, geyser, geological formation, volcano, mountain, landscape, water, environment, travel, river, natural elevation, park, rock, outdoor, sky, waterfall, stream, natural, scenic, summer, forest, stone, tree, wild, tourism, outdoors, HD wallpaper
1920x1080pxnature, waterfall, valley, river, canyon, water, landscape, rock, forest, stream, mountain, stone, ravine, tree, outdoor, park, natural depression, flowing, travel, environment, falls, fall, cascade, summer, creek, natural, rocks, wild, scenery, outdoors, spring, flow, tourism, splash, waterfalls, scenic, lake, wilderness, tranquil, peaceful, HD wallpaper
1920x1080pxwaterfall, nature, river, water, rock, stream, stone, forest, landscape, spring, park, cascade, outdoor, environment, mountain, creek, travel, fall, flowing, tree, wild, natural, falls, valley, splash, flow, summer, rocks, waterfalls, wet, motion, peaceful, scenery, tourism, fresh, scenic, outdoors, falling, moss, tranquil, HD wallpaper
1920x1080pxnature, waterfall, water, dam, river, landscape, barrier, forest, rock, stone, mountain, scenic, travel, obstruction, stream, outdoor, park, tree, natural, cascade, falls, sky, lake, environment, fall, wild, summer, rocks, trees, outdoors, creek, structure, flow, splash, flowing, tourism, wet, scenery, peaceful, tranquil, HD wallpaper
1920x1080pxwaterfall, nature, river, water, rock, stream, forest, landscape, stone, outdoor, mountain, park, environment, cascade, tree, creek, natural, travel, fall, wild, flowing, summer, spring, splash, falls, flow, rocks, scenery, motion, waterfalls, peaceful, wet, scenic, tourism, outdoors, tranquil, moss, fresh, leaf, serene, HD wallpaper
1920x1080pxnature, waterfall, river, water, landscape, rock, stream, forest, stone, spring, environment, mountain, outdoor, park, valley, travel, cascade, falls, tree, fall, canyon, flowing, summer, rocks, natural, creek, wild, scenery, splash, tourism, scenic, waterfalls, outdoors, flow, ravine, wilderness, peaceful, falling, motion, wet, HD wallpaper
1920x1080pxwaterfall, nature, river, water, rock, stone, landscape, forest, stream, outdoor, mountain, environment, cascade, dam, park, flowing, falls, natural, creek, fall, tree, travel, scenic, rocks, barrier, splash, summer, spring, flow, wild, scenery, motion, moss, wilderness, wet, tranquil, waterfalls, falling, obstruction, serene, HD wallpaper
1920x1080pxnature, waterfall, water, spring, dam, landscape, river, barrier, forest, rock, stream, stone, mountain, travel, obstruction, natural, sky, outdoor, park, scenic, outdoors, lake, tree, cascade, trees, spray, creek, environment, tourism, rocks, summer, weather, falls, national, flowing, structure, wild, vacation, scene, peaceful, HD wallpaper
1920x1080pxnature, landscape, sky, water, lake, tree, summer, sea, clouds, scenery, travel, scenic, outdoor, coast, grass, shore, forest, ocean, river, tourism, trees, cloud, vacation, reflection, park, sun, scene, day, outdoors, mountain, mountains, clear, season, horizon, beach, sunlight, hill, environment, wild, sunny, HD wallpaper
1920x1080pxnature, waterfall, spring, water, landscape, river, rock, travel, outdoor, stone, scenic, stream, natural, forest, environment, mountain, summer, park, tree, sky, tourism, rocks, wild, falls, scenery, creek, cascade, outdoors, trees, spray, ecology, fall, grass, sea, lake, flowing, flow, ocean, peaceful, coast, HD wallpaper
1920x1080pxwaterfall, nature, river, water, stream, rock, forest, stone, landscape, park, cascade, environment, outdoor, mountain, creek, travel, flowing, wild, tree, natural, fall, falls, spring, splash, rocks, flow, wet, motion, waterfalls, summer, tourism, peaceful, fresh, outdoors, falling, ecology, scenery, moss, leaf, scenic, HD wallpaper
1920x1080pxnature, waterfall, water, river, landscape, rock, stone, forest, park, stream, environment, tree, outdoor, travel, mountain, spray, spring, natural, rocks, scenic, fall, tourism, falls, cascade, summer, wild, creek, scenery, lake, outdoors, trees, flowing, splash, wilderness, waterfalls, peaceful, flow, ecology, stones, motion, HD wallpaper
5184x3456pxbody of water surrounding trees, Callahan, Run, body of water, trees, Pennsylvania, Lycoming County, Tiadaghton State Forest, Pine Creek Gorge, Big Pine, Black Forest Trail, Wilds, hiking, stream, creek, cascades waterfall, rocks, moss, forest, leaf litter, ravine, spring, creative commons, nature, waterfall, river, tree, water, outdoors, landscape, flowing Water, scenics, rock - Object, beauty In Nature, freshness, green Color, flowing, leaf, HD wallpaper
1920x1080pxnature, valley, natural depression, canyon, mountain, river, landscape, ravine, water, rock, waterfall, geological formation, travel, mountains, forest, park, stream, hill, stone, trees, tree, sky, summer, scenic, tourism, national, rocks, cascade, natural, outdoors, outdoor, fall, environment, wild, scenery, lake, wilderness, grass, creek, falls, HD wallpaper
1920x1080pxspring, nature, geyser, geological formation, landscape, water, mountain, volcano, environment, river, fountain, park, rock, travel, waterfall, outdoor, sky, stream, natural, scenic, forest, summer, stone, tree, wild, national, trees, tourism, outdoors, steam, ocean, HD wallpaper
5184x3456pxphoto of top of mountain under blue sky, shasta, shasta, View, Shasta, photo, top, mountain, blue sky, BLM, Bureau of Land Management, NLCS, National, Landscape, Conservation, System, Lands Department, Department of the Interior, Oregon, Washington, Wild and Scenic River, Wilderness Area, 50th Anniversary, Wilderness Act of 1964, Camping, Backpacking, America, Great Outdoors, Outside, Recreation, Hunting, Fishing, Hiking, Climbing, Solitude, Northwest Pacific, Pacific Northwest, natural resources, ecology, environment, mountain wilderness, pilot rock, mount Shasta, pct, pacific crest trail, Cascade-Siskiyou National Monument, nature, sunset, mountain Peak, scenics, sunrise - Dawn, sky, outdoors, HD wallpaper
5184x3456pxblack and gray Bird above body of water during daytime, Bird, black and gray, body of water, daytime, BLM, Bureau of Land Management, NLCS, National, Landscape, Conservation, System, Lands Department, Department of the Interior, Oregon, Washington, Wild and Scenic River, Wilderness Area, 50th Anniversary, Wilderness Act of 1964, Camping, Backpacking, America, Great Outdoors, Outside, Recreation, Hunting, Fishing, Hiking, Climbing, Solitude, Northwest Pacific, Pacific Northwest, natural resources, ecology, environment, Steens Mountain Wilderness, nature, animal, flying, blue, wildlife, water, HD wallpaper
6379x3940pxriver surrounded by two plateaus, Wild Earth, Winery, At Night, plateaus, com, Horizontal, Colour, Color, Night Time, Time Out, Outdoor, Outdoors, Outside, River, Gorge, Queenstown, Cromwell, Otago Central, Central Otago, Dinner, Workshop, mysterious, Sky, Clouds, Mountain, Bushes, Valley Bridge, Blue, White, Yellow, Glow, Gold, Orange, Green, Reflections, Reflection, Mirror, Moon, Restaurant, Long Exposure, Autumn Fall, Lights, nature, landscape, scenics, water, beauty In Nature, HD wallpaper
1920x1080pxfunny, spring, landscape, geyser, water, sky, travel, weather, environment, outdoor, clouds, summer, geological formation, river, rock, forest, atmosphere, park, cloud, mountain, ocean, scenic, natural, stone, sea, outdoors, tree, rainbow, stream, trees, beach, waterfall, tourism, coast, scenery, wild, power, vacation, coastline, cloudy, HD wallpaper
3840x2160pxnature, waterfall, river, water, landscape, rock, stone, forest, park, tree, stream, environment, outdoor, mountain, travel, fall, rocks, cascade, scenic, summer, falls, spring, natural, tourism, creek, lake, outdoors, wild, splash, scenery, flowing, trees, flow, wilderness, peaceful, serene, waterfalls, stones, motion, grass, HD wallpaper
1920x1080pxwaterfall, nature, river, water, rock, stream, landscape, forest, stone, outdoor, mountain, environment, park, cascade, fall, travel, creek, tree, wild, natural, flowing, summer, falls, splash, spring, flow, rocks, scenery, motion, waterfalls, peaceful, wet, scenic, tourism, outdoors, tranquil, fresh, leaf, serene, moss, HD wallpaper
1920x1080pxwaterfall, nature, river, water, stream, rock, forest, stone, landscape, park, cascade, environment, outdoor, mountain, creek, travel, flowing, wild, tree, fall, natural, falls, spring, splash, rocks, flow, motion, wet, waterfalls, summer, tourism, peaceful, fresh, falling, outdoors, scenery, ecology, moss, scenic, leaf, HD wallpaper
1920x1080pxnature, waterfall, river, water, landscape, forest, rock, stone, stream, spring, outdoor, park, valley, mountain, travel, environment, tree, fall, cascade, creek, natural, wild, splash, rocks, scenic, summer, falls, flowing, flow, scenery, trees, tourism, lake, peaceful, natural depression, outdoors, wet, fresh, ecology, national, HD wallpaper
1920x1080pxnature, landscape, water, lake, sky, tree, forest, river, trees, clouds, reflection, mountain, mountains, summer, scenery, travel, park, shore, sea, land, outdoor, cloud, outdoors, ocean, environment, scenic, scene, coast, tourism, grass, season, rock, autumn, beach, idyllic, tranquil, rocks, vacation, wild, national, HD wallpaper
1920x1080pxwaterfall, nature, valley, river, rock, water, canyon, stream, natural depression, forest, landscape, stone, ravine, mountain, park, cascade, flowing, outdoor, environment, creek, fall, wild, travel, falls, tree, natural, flow, summer, splash, rocks, spring, motion, waterfalls, scenery, outdoors, wet, geological formation, peaceful, scenic, tourism, HD wallpaper
3840x2560pxcreek, daylight, environment, foliage, forest, guidance, landscape, leaves, light, moss, mountain, nature, outdoors, park, river, rock, rocks, scenic, stream, travel, trees, water, wild, wood, HD wallpaper
5184x3456pxtree against sunset, Sunset Tree, BLM, Bureau of Land Management, NLCS, National, Landscape, Conservation, System, Lands Department, Department of the Interior, Oregon, Washington, Wild and Scenic River, Wilderness Area, 50th Anniversary, Wilderness Act of 1964, Camping, Backpacking, America, Great Outdoors, Outside, Recreation, Hunting, Fishing, Hiking, Climbing, Solitude, Northwest Pacific, Pacific Northwest, natural resources, ecology, environment, mountain wilderness, Cascade-Siskiyou National Monument, ashland, view, scenery, silhouette, sunset, nature, sky, HD wallpaper
2000x1333pxlandscape photo of waterfall near green leaf trees and plants, oregon, deschutes, oregon, deschutes, Social Media, Takeover, August 15th, Bucket List, Oregon, Deschutes, Wild and Scenic River, landscape, photo, waterfall, green leaf, trees, plants, BLM, Bureau of Land Management, lands, national monument, monument national, conservation area, Wilderness, river wild, national historic trail, urban, escape, day trip, roadtrip, nature, river, forest, water, stream, scenics, tree, falling, beauty In Nature, freshness, HD wallpaper
3840x2550pxalpine, bloom, blossom, blue, countryside, environment, flowers, grass, green, hill, idyllic, lake, landscape, meadow, mountain, nature, outdoor, peak, range, river, rural, scenic, tourism, water, wild flowers, wildernes, HD wallpaper
3840x2560pxclouds, conifer, dawn, daylight, environment, evergreen, lake, landscape, mountains, nature, outdoors, park, placid, reflection, river, rocks, scene, scenery, scenic, sky, snow, summer, sunset, travel, trees, water, wilde, HD wallpaper
1920x1080pxnature, spring, landscape, water, travel, outdoor, river, sky, environment, rock, scenic, summer, park, natural, geyser, stream, waterfall, stone, tourism, tree, ocean, mountain, forest, outdoors, sea, beach, wild, cloud, creek, HD wallpaper
3099x3031pxwaterfalls surrounded with trees during daytime, Spillover, waterfalls, trees, daytime, Pennsylvania, Clinton County, East Keating Township, Sproul State Forest, Round Island, Run Round, Falls, Allegheny Plateau, Wilds, hiking, stream, creek, waterfall, ravine, rhododendron, forest, coniferous, spring, low light, creative commons, nature, river, tree, leaf, water, tropical Rainforest, freshness, scenics, outdoors, beauty In Nature, green Color, landscape, HD wallpaper
