1116-49384 - Acidic pools, mineral formations, salt deposits in the crater of Dallol Volcano, Danakil Depression, Afar Region, Ethiopia

1116-49383 - Acidic pools, mineral formations, salt deposits in the crater of Dallol Volcano, Danakil Depression, Afar Region, Ethiopia

1116-42414 - Colourful Pools Formed By Calcite Deposits, Huanglong, Sichuan Province, China

1116-42411 - Colourful Pools Formed By Calcite Deposits, Huanglong, Sichuan Province, China

1116-42413 - Colourful Pools Formed By Calcite Deposits, Huanglong, Sichuan Province, China

1116-42412 - Colourful Pools Formed By Calcite Deposits, Huanglong, Sichuan Province, China

1245-1511 - Salt formations on the shore of the Dead Sea at dusk, Karak Governorate, Jordan, Middle East

832-383221 - Travertine terrace formations, UNESCO World Heritage Site, Pamukkale, Denizli Province, Aegean Region, Turkey, Asia

832-368298 - Solfataras, fumaroles, mud pools, sulfur and other minerals, steam, Hveraroend geothermal area, N√°mafjall mountains, M√Ωvatn area, Nor√∞urland eystra, the north-east region, Iceland, Europe

832-375942 - Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, United States of America

832-368297 - Solfataras, fumaroles, mud pools, sulfur and other minerals, steam, Hveraroend geothermal area, N√°mafjall mountains, M√Ωvatn area, Nor√∞urland eystra, the north-east region, Iceland, Europe

832-309707 - Svartifoss, "Black Waterfall, " with basalt columns, Skaftafell National Park, southeast Iceland, Iceland

832-309708 - Svartifoss, "Black Waterfall, " with basalt columns, Skaftafell National Park, southeast Iceland, Iceland

832-302584 - Mammoth Hot Springs, Yellowstone Nationalpark, Wyoming, USA, United States of America

832-95463 - Sulphure formations, Dallol, Danakil Depression, Ethiopia, Africa

832-68116 - Eroded hoodoos and rock formations in the Coal Mine Canyon, coloured by minerals, Coal Mine Mesa, Painted Desert, Hopi Reservation, Navajo Nation Reservation, Arizona, USA

832-85619 - Sulphure formations, Dallol, Danakil Depression, Ethiopia, Africa

832-85620 - Sulphure formations, Dallol, Danakil Depression, Ethiopia, Africa

832-85630 - Sulphure formations, Dallol, Danakil Depression, Ethiopia, Africa

832-68111 - Eroded hoodoos and rock formations in the Coal Mine Canyon, coloured by minerals, Coal Mine Mesa, Painted Desert, Hopi Reservation, Navajo Nation Reservation, Arizona, USA

832-68114 - Eroded hoodoos and rock formations in the Coal Mine Canyon, coloured by minerals, Coal Mine Mesa, Painted Desert, Hopi Reservation, Navajo Nation Reservation, Arizona, USA

1116-30152 - Hawaii, Maui, Makena, Ahihi Kinau Natural Reserve, Anchialine pond.

1116-30161 - Hawaii, Maui, Makena, Ahihi Kinau Natural Reserve.

1116-30154 - Hawaii, Maui, Makena, Ahihi Kinau Natural Reserve, Anchialine pond.

1116-30156 - Hawaii, Maui, Makena, Ahihi Kinau Natural Reserve, Anchialine pond.

857-70947 - Tufa formations, towering remnants created by the upwelling of mineral deposits that formed underwater, make for an interesting and otherworldly scene at twilight along the shore of California's Mono Lake.

832-7052 - Mammoth Hot Springs, Yellowstone Nationalpark, Wyoming, USA, Vereinigte Staaten von Amerika

698-2283 - Wooden boardwalk over the mineral sinter formations on Geyser Hill, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

252-11230 - Water rich in blue-green algae (cyanobacteria), mineral salts and fine silica mud at the geothermal spa that owes its existence to the Svartsengi geothermal power plant, Blue Lagoon, near Reykjavik, Iceland, Polar Regions

757-79 - Landscape, Laguna Colorada, Bolivia, South America