1382-1114 - Houses of Melnik among the eroded natural sand hills, Melnik, Pirin mountains, Bulgaria, Europe

1116-53659 - Surreal landscape of White Pocket with stormy clouds gathering overtop. They are comprised of swirling, multicolured Navajo Limestone with domes, hoodoos and potholes, Arizona, United States of America

1116-53658 - View of geometric patterns on rocky hills referred to as Brain Rocks, against a cloudy sky forming part of the alien landscape of amazing lines, contours and shapes in the wondrous area known as White Pocket, situated in Arizona, Arizona, United States of America

1311-983 - Goblin Garden west of Hamilili Point in Petrified Forest National Park, Arizona, United States of America, North America

1311-960 - Hoodoo filled cliffs on the north side of Blue Mesa in Petrified Forest National Park, Arizona, United States of America, North America

1311-912 - A deep canyon eroded thru the hills of purple and gray bentonite clay near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America

1311-911 - A deep canyon eroded thru the hills of purple and gray bentonite clay near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America

1242-608 - The Pancake Rocks, an unusual formation of limestone layered like sedimentary rock and eroded by water and wind, Punakaiki, West Coast, South Island, New Zealand, Pacific

832-404012 - View over eroded mountainous landscape with brown hills, mountains and steppe, Chuy province, Kyrgyzstan, Asia

832-404011 - View over eroded mountainous landscape with brown hills, mountains and steppe, Chuy province, Kyrgyzstan, Asia

832-404010 - View over eroded mountainous landscape with brown hills, mountains and steppe, Chuy province, Kyrgyzstan, Asia

832-395612 - Viewpoint on a sandstone, in autumn and winter sunrise in the morning, Dahn, Palatinate Forest, Rhineland-Palatinate, Germany, Europe

1178-32071 - USA, California, Lone Pine, Alabama Hills rock formations in Sierra Nevada Mountains

1178-32069 - USA, California, Lone Pine, Alabama Hills rock formations in Sierra Nevada Mountains

832-388325 - The Vinales Valley with its rocky hills, the unique Mogoths and scattered Royal palms (Roystonea regia), Vinales, Cuba, Central America

450-4413 - Landscape of Pampas de Lequezana, where trees have been planted to prevent soil erosion, near Potosi, Bolivia, South America

860-287105 - Eroded hills of sedimentary conglomerate and sandstone, Unesco World Heritage, Zhangye, China

860-287102 - Eroded hills of sedimentary conglomerate and sandstone, Unesco World Heritage, Zhangye, China

860-287107 - Eroded hills of sedimentary conglomerate and sandstone, Unesco World Heritage, Zhangye, China

860-287104 - Eroded hills of sedimentary conglomerate and sandstone, Unesco World Heritage, Zhangye, China

860-287106 - Tourist photograph, Eroded hills of sedimentary conglomerate and sandstone, Unesco World Heritage, Zhangye, China

860-287100 - Eroded hills of sedimentary conglomerate and sandstone, Unesco World Heritage, Zhangye, China

860-287099 - Tourist in Eroded hills of sedimentary conglomerate and sandstone, Unesco World Heritage, Zhangye, China

860-287101 - Eroded hills of sedimentary conglomerate and sandstone, Unesco World Heritage, Zhangye, China

860-287103 - Monk and Eroded hills of sedimentary conglomerate and sandstone, Unesco World Heritage, Zhangye, China

857-94422 - Male hiker nears Parriott Mesa in Castle Valley near Moab, Utah

911-10742 - Peat Hags on king bank head above Biggar in the Southern Uplands of Scotland, UK. These peat covered moorland hills are an important carbon sink.

911-10655 - A mountain peak, peeping through the cloud at Bourbonhamna 77¬8 33‚Äôn 15¬8 00‚Äôe Spitsbergen; Svalbard, with a yacht sailing past.

1178-8203 - USA, Nevada, Valley of Fire, Red Rock Hills

911-10557 - A lichen covered boulder on Beinn Ghlas, a Munro on the side of Ben Lawers.

816-5669 - Mirima National Park (Hidden Valley National Park) near Kununurra, Kimberleys, Western Australia, Australia, Pacific

816-5668 - Mirima National Park (Hidden Valley National Park) near Kununurra, Kimberleys, Western Australia, Australia, Pacific

832-78220 - Ruined Kasbah on a hill, a former Berbers' house built of adobe, mountain range of the Djebel Kissane table mountain at the back, Draa Valley, southern Morocco, Morocco, Africa

1116-5748 - Rock Formations In Goreme National Park, Cappadocia, Anatolia, Nevsehir Province, Turkey

1116-5746 - Rock Formations In Goreme National Park, Cappadocia, Anatolia, Nevsehir Province, Turkey

1190-506 - Mobius arch, natural arch formed out of granite rock at sunrise, lone pine peak, 12994, feet, alabama hills, sierra nevada, lone pine, california, usa

1190-505 - Mobius arch, natural arch formed out of granit rock at sunrise, lone pine peak, 12994, feet, mt. whitney, 14497, feet, highest peak of lower 48, alabama hills, sierra nevada, lone pine, california, usa

911-8168 - Peat hags near Loadpot Hill above Ullswater in the Lake District, Cumbria, England, Unnited Kingdom, Europe

911-8167 - Peat hags near Loadpot Hill above Ullswater in the Lake District, Cumbria, England, Unnited Kingdom, Europe

776-3352 - Devils Golf Course, Death Valley National Park, California, United States of America, North America

911-4102 - Trees planted in Loess deposits in Shanxi province, northern China, Asia

911-3209 - Wastwater and the screes in the Lake District National Park, Cumbria, England, United Kingdom, Europe

847-226 - One of the Colossi of Memnon with the Theban hills behind, Thebes, UNESCO World Heritage Site, Egypt, North Africa, Africa

767-824 - Hocking Hills State Park, Ohio, United States of America, North America

767-825 - Hocking Hills State Park, Ohio, United States of America, North America

764-2661 - Petrified wood and an eroded hill, Petrified Forest National Park, Arizona, United States of America, North America

764-1936 - Petrified wood and an eroded hill, Petrified Forest National Park, Arizona, United States of America, North America

823-286 - Aerial view of highland savannah and erosion, near Ireng River, Rupununi District, Guyana, South America

29-3461 - Deforestation for farmland, cleared by slash and burn, Mogok Hills, Mandalay District, Myanmar (Burma), Asia

794-452 - Eroded rock pinnacles, Valle de la Luna (Valley of the Moon), Atacama Desert, Norte Grande, Chile, South America

557-1087 - Arid hills at Wadi Qelt and the Valley of the River Jordan in the Judean Desert, Israel, Middle East

777-1268 - Rock arch, Alabama Hills Recreation Area, Eastern Sierra region, California, United States of America, North America

777-1266 - Mount Whitney viewed through rock arch, Alabama Hills Recreation Area, Eastern Sierra region, California, United States of America, North America

756-493 - Moon Land eroded cliffs, Lamayuru, Ladakh, Indian Himalayas, India, Asia

756-491 - Moon Land eroded cliffs, Lamayuru, Ladakh, Indian Himalayas, India, Asia

29-2643 - Gullies eroded into the Pierre shales, Badlands National Park, South Dakota, USA

126-420 - Rice fields and terracing in a valley in the Shahrak region, Iran, Middle East

252-3094 - Landscape of bare hills in Death Valley National Monument, California, United States of America, North America

615-673 - Rock formations, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

29-4230 - Yellow River loesslands, gullied and terraced hillsides, Gansu Province, China, Asia

83-4608 - Detail from the dramatic landscape of the Painted Hills, where rapid erosion has shaped colourful mineral-rich clays, John Day Fossil Beds National Monument, Oregon, United States of America, North America

83-587 - Badlands from Zabriskie Point, looking west, Death Valley National Monument, California, United States of America (U.S.A.), North America

255-7687 - Ille-sur-Tete, Les Orgues, Pyrenees-Orientales, Languedoc-Roussillon, France, Europe

367-1221 - Blue Mesa, Petrified Forest National Park, Arizona, United States of America (U.S.A.), North America

83-8057 - Part of the North Unit of Badlands National Park, South Dakota, United States of America, North America

681-1722 - Landscape near Almeria, Andalucia, Spain, Europe