832-402791 - Aerial view, sinter steps, sinter terraces, lime sinter terraces, Egerszalok, Egerszalok, Eger, Heves, Hungary, Europe

832-402790 - Aerial view, sinter steps, sinter terraces, lime sinter terraces, Egerszalok, Egerszalok, Eger, Heves, Hungary, Europe

832-393499 - Roman amphitheatre carved out of the tufa, Sutri, Viterbo Province, Lazio Region, Italy, Europe

832-393498 - Roman amphitheatre carved out of the tufa, Sutri, Viterbo Province, Lazio Region, Italy, Europe

1160-4592 - Tufa formations at Mono Lake, South Tufa State Reserve, Sierra Nevada, California, United States of America, North America

1160-4593 - Tufa formations at Mono Lake, South Tufa State Reserve, Sierra Nevada, California, United States of America, North America

1160-4588 - Tufa formations at Mono Lake, South Tufa State Reserve, Sierra Nevada, California, United States of America, North America

1160-4591 - Tufa formations at Mono Lake, South Tufa State Reserve, Sierra Nevada, California, United States of America, North America

1160-4590 - Tufa formations at Mono Lake, South Tufa State Reserve, Sierra Nevada, California, United States of America, North America

832-387790 - Erupting Pohutu Geyser with rainbow, sinter terraces, Te Puia, Whakarewarewa, Rotorua, Bay of Plenty, New Zealand, Oceania

252-3078 - Tufas (calcium carbonate), Mono Lake, Tufa State Reserve, California, USA, North America

1116-46214 - Tufa Formations At Sunrise, Mono Lake, Lee Vining, California, United States Of America

746-78316 - Sassi of Matera and the Cathedral, Old Town, Matera, Basilicata, Italy

746-78307 - Sassi of Matera, la Civita and Sasso Barisano with the Cathedral, Matera, Basilicata, Italy

746-78319 - Sassi of Matera, Old Town, Matera, Basilicata, Italy

746-78309 - Sassi of Matera, la Civita and Sasso Barisano with the Cathedral, Matera, Basilicata, Italy

746-78321 - Sassi of Matera, Old Town, Matera, Basilicata, Italy

857-93051 - A woman and her daughter stand up paddleboarding on Mono Lake from South Tufa Beach, Lee Vining, California.

857-92917 - The Trona Pinnacles are pictured on a hot summer day in Trona, Calif., on June 7, 2015. The unique formations, known as tufa towers, are primarily made of calcium carbonate and were formed when the springs interacted with the water in what was once Searles Lake.

799-3154 - Greene's Rabbitbrush (Chrysothamnus greenei) growing among the Tufa towers near the shores of Mono Lake, California, United States of America, North America

911-10725 - Goredale scar, an ancient collapsed cave near Malham in the Yorkshire Dales.

799-2875 - Tufa Towers on Mono Lake at sunset, California, United States of America, North America

799-2730 - Salt pillar formations at sunset, South Tufa, Mono Lake, California, United States of America, North America

832-371901 - Balloon flight over the valley of Goereme, Cappadocia, Turkey, Western Asia

832-375964 - Sunlight, tuff rock formations at Mono Lake, South Tufa, Lee Vining, California, USA, North America

832-375079 - Tufa formations, Uchisar, Cappadocia, Turkey

832-375965 - Interesting tuff rock formations, Mono Lake, Lee Vining, California, USA

832-310435 - Seven moais of Ahu Akivi, stone sculptures, Rapa Nui National Park, Easter Island, Chile, Oceania

832-310433 - Moai Ahu Tahai, stone sculpture, sunset, Rapa Nui National Park, Easter Island, Chile, Oceania

832-302911 - Strange tuff rock formations, Mono Lake (alkaline lake), Lee Vining, California, USA

832-302915 - Strange tuff rock formations, Mono Lake (alkaline lake), Lee Vining, California, USA

832-364463 - Tufa formations, Valley of the Monks (Pasabagi-Valley) near Goereme, Cappadocia, Anatolia, Turkey

832-364453 - Tufa formations, Valley of the Monks (Pasabagi-Valley) near Goereme, Cappadocia, Anatolia, Turkey

832-364451 - Tufa formations, Valley of the Monks (Pasabagi-Valley) near Goereme, Cappadocia, Anatolia, Turkey

832-364459 - Tufa formations, Valley of the Monks (Pasabagi-Valley) near Goereme, Cappadocia, Anatolia, Turkey

832-364447 - Police station, Valley of the Monks (Pasabagi-Valley) near Goereme, Cappadocia, Anatolia, Turkey

832-364448 - Tufa formations, Valley of the Monks (Pasabagi-Valley) near Goereme, Cappadocia, Anatolia, Turkey

832-364445 - Bizarre tufa formations, Devrent Valley near Goereme, Cappadocia, Anatolia, Turkey

832-364818 - Tuff rock landscape near Goereme, Cappadocia, Anatolia, Turkey, Asia

832-364820 - Tuff rock landscape near Goereme, Cappadocia, Anatolia, Turkey, Asia

832-364824 - Tuff rock landscape near Goereme, Cappadocia, Anatolia, Turkey, Asia

832-364825 - Tuff rock landscape near Goereme, Cappadocia, Anatolia, Turkey, Asia

832-364819 - Tuff rock landscape near Goereme, Cappadocia, Anatolia, Turkey, Asia

832-364816 - Tuff rock landscape near Goereme, Cappadocia, Anatolia, Turkey, Asia

832-249634 - Rock Valley, tuff rock landscape near Goereme, Cappadocia, Central Anatolia, Turkey, Asia

832-249672 - Tuff rock formation, fairy chimneys in the Valley of the Monks, Pasabagi Valley near Goereme, Cappadocia, Central Anatolia, Turkey, Asia

832-249620 - Hot air balloons and tuff rock landscape near Goereme, Cappadocia, Central Anatolia, Turkey, Asia

832-249665 - Rock dwellings of Uchisar, Cappadocia, Cental Anatolia, Turkey, Asia

832-249676 - Tuff rock formation, fairy chimneys in the Valley of the Monks, Pasabagi Valley near Goereme, Cappadocia, Central Anatolia, Turkey, Asia

832-249639 - Old cemetery amidst a tuff rock landscape near Goereme, Cappadocia, Central Anatolia, Turkey, Asia

832-249660 - Rock dwellings of Uchisar, Cappadocia, Cental Anatolia, Turkey, Asia

832-249621 - Tuff rock landscape and castle mountains near Goereme, Cappadocia, Central Anatolia, Turkey, Asia

832-249681 - Ortahisar, Cappadocia, Central Anatolia, Turkey, Asia

832-249663 - Rock dwellings of Uchisar, Cappadocia, Cental Anatolia, Turkey, Asia

832-249629 - Tuff rock landscape near Goereme, Cappadocia, Central Anatolia, Turkey, Asia

832-249646 - Rock church in Goereme open air museum and UNESCO World Heritage Site, Cappadocia, Central Anatolia, Turkey, Asia

832-249656 - Tuff rock landscape in Devrent Valley near Zelve, Cappadocia, Central Anatolia, Turkey, Asia

832-249683 - Ortahisar Fortress, Cappadocia, Central Anatolia, Turkey, Asia

832-249612 - Hot air balloons over Cappadocia, Central Anatolia, Turkey, Asia

832-249684 - Ortahisar Fortress, Cappadocia, Central Anatolia, Turkey, Asia

832-249642 - Goereme open air museum and UNESCO World Heritage Site, Cappadocia, Central Anatolia, Turkey, Asia

832-249682 - Ortahisar, Cappadocia, Central Anatolia, Turkey, Asia

832-249675 - Tuff rock formation, fairy chimneys in the Valley of the Monks, Pasabagi Valley near Goereme, Cappadocia, Central Anatolia, Turkey, Asia

832-229675 - Calcareous tufa spires in Mono Lake, Lee Vining, California, USA

832-131096 - Mountain bikers cycling in Goereme, Cappadocia, Turkey

832-131130 - Balloon flight over the valley of Goereme, Cappadocia, Turkey, Western Asia

832-131100 - Mountain bikers in Love Valley, Guevercinlik Valley, Goereme, Cappadocia, Turkey

832-131131 - Balloon flight over the valley of Goereme, Cappadocia, Turkey, Western Asia

832-132184 - View to medieval limestone town of Pitigliano, situated on rocks raising from a green valley, Maremma, Tuscany, Italy, Europe

832-131128 - Goereme Kaya Hotel, Goereme, Cappadocia, Turkey, Western Asia

832-132183 - View to medieval limestone town of Pitigliano, situated on rocks raising from a green valley, Maremma, Tuscany, Italy, Europe

832-131097 - Mountain bikers in Love Valley, Guevercinlik Valley, Goereme, Cappadocia, Turkey

832-131099 - Mountain bikers cycling in Love Valley, Guevercinlik Valley, Goereme, Cappadocia, Turkey

832-131126 - Mountain bikers in the Rose Valley, Uchisar, Goereme Valley, Cappadocia, Turkey, Western Asia

832-105879 - Panorama, Tufa landscape with cave dwellings, Goreme, Cappadocia, Anatolia, Turkey, Asia

832-105871 - Riders with horses walking through the tufa landscape of the UNESCO World Heritage Site Goreme, Cappadocia, central Anatolia, Turkey, Asia

1113-91823 - Vines and Fairy Chimney in the Valley of love, Tufa erosion, Goereme National Park, UNESCO World Nature Site, Cappadocia, Anatolia, Turkey

1113-91821 - Tufa erosion in the Rose Valley near Goereme, Goereme National Park, UNESCO World Nature Site, Cappadocia, Anatolia, Turkey

832-74532 - Fairy chimneys, rock formations of tufa, Pasabag Valley, Goreme, Cappadocia, central Anatolia, Turkey

1113-91835 - Erosion of tuff with light near Uchisar, UNESCO World Nature Site, Kappadokien, Turkey

832-74533 - Fairy chimneys, rock formations of tufa, Pasabag Valley, Goreme, Cappadocia, central Anatolia, Turkey

832-43618 - Fairy chimneys, tufa landscape in the valley of love in Goreme, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey

832-48164 - Parachute Tufa, dawn, sunrise, tufa rock formations, South Tufa Area, Mono Lake, a saline lake, Mono Basin and Range region, Sierra Nevada, California, United States of America, USA

832-43624 - Hot air balloons near Goreme, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey

832-48161 - Spectacular sunset, tufa rock formations, South Tufa Area, Mono Lake, a saline lake, Mono Basin and Range region, Sierra Nevada, California, United States of America, USA

832-41756 - Cliff dwellings of Uchisar, Cappadocia, Central Anatolia, Turkey, Asia

832-48184 - Parachute Tufa, dawn, sunrise, tufa rocks, tufa formations, South Tufa Area, Mono Lake, saline lake, Mono Basin and Range Region, Sierra Nevada, California, United States of America, USA

832-48191 - Parachute Tufa with osprey (Pandion haliaetus) on the nest, dusk, tufa rocks, tufa formations, South Tufa Area, Mono Lake, saline lake, Mono Basin and Range Region, Sierra Nevada, California, United States of America, USA

832-43622 - Tufa Fairy Chimneys with basalt blocks placed on top, rock formations at Cavushin, Goreme, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey

832-41755 - Fairy chimneys, tuff landscape in Uerguep, Cappadocia, Central Anatolia, Turkey, Asia

832-43621 - Tufa Fairy Chimneys with basalt blocks placed on top, rock formations at Cavushin, Goreme, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey

832-48171 - Dawn, sunrise, tufa rock formations, South Tufa Area, Mono Lake, a saline lake, Mono Basin and Range region, Sierra Nevada, California, United States of America, USA

832-36012 - Sunlight, tuff rock formations at Mono Lake, South Tufa, Lee Vining, California, USA, North America

698-2804 - Tufa spires and tower formations of calcium carbonate at sunset, Mono Lake, South Tufa Reserve, Mono Basin Scenic Area, Lee Vining, Inyo National Forest Scenic Area, California, United States of America, North America

698-2805 - Tufa spires and tower formations of calcium carbonate at sunset, Mono Lake, South Tufa Reserve, Mono Basin Scenic Area, Lee Vining, Inyo National Forest Scenic Area, California, United States of America, North America

797-8527 - Turkey, Cappadocia, Goreme, View across Rose Valley in foreground towards Red Valley behind. Cultivated land and eroded peaks of volcanic tufa rock formations.

832-23910 - bizarre tufa formations, Devrent Valley near Goereme, Cappadocia, Anatolia, Turkey

794-595 - Hot air balloon taking off with tourists on board for a flight over the famous volcanic tufa rock formations around Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia

794-588 - Hot air balloon flight over the famous volcanic tufa rock formations around Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia

794-548 - Volcanic tufa formations, known as fairy chimneys, Pasabag, near Zelve, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia