Panoramic view of tufa formations, Valley of the Fairy Chimneys (Pasabag), near Zelve, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

Tufa towers in Mono Lake at twilight, California, United States of America, North America

Tufa towers in Mono Lake at twilight, California, United States of America, North America

Mono Lake tufa towers at sunset in autumn, California, United States of America, North America

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

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

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

Sunrise above the tufa towers on Mono Lake, California, United States of America, North America

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

Tufa towers on the shores of Mono Lake, California, United States of America, North America

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

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

Tufa towers at Lac Abhe (Abbe), formed by hot springs beneath old lake at higher level, Afar Triangle, Djibouti, Africa

Lac Abhe (Abbe) in wide rift valley, tufa towers, relics from old lake at higher level, Afar Triangle, Djibouti, Ethiopia

Tufa towers at Lac Abhe (Abbe), formed by hot springs beneath old lake at higher level, Afar Triangle, Djibouti, Africa

Tufa towers, South Tufa Aerea, Mono Lake, California, USA

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

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

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

The town on its limestone plateau with tower of the cathedral Santi Pietro e Paolo, Pitigliano, Maremma, Tuscany, Italy, Europe

Mutterturm tower, studio of Hubert von Herkomer, built in 1844, Herkomermuseum, Landsberg am Lech, Bavaria, Germany, Europe

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.