Caleta Negra (Black Bay) a popular boat trip and walk with its distinctive sedimentary and lava strata, Ajuy, Fuerteventura, Spain, Atlantic, Europe

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

People are bathing in the hot springs of Saturnia Therme, Saturnia, Tuscany, Italy, Europe

Tourists standing on the edge of Grand Prismatic Spring, Yellowstone National Park, Wyoming, United States, North America

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

Sinter terraces with calcareous tuff deposits, hot springs, colorful mineral deposits, Palette Springs, Lower Terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, North America

Dead trees on sinter terraces, hot springs, orange mineral deposits, Palette Springs, Upper Terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, North America

Riesenburg cave, natural karst cave ruin of Frankendolomite, geotope, natural monument, in the back climber at rock face, near Engelhardsberg, district of Markt Wiesenttal, Upper Franconia, Franconian Switzerland, Franconia, Bavaria, Germany, Europe

Laugahraun Lava Field, Rhyolite Mountains, Landmannalaugar, Highlands, Iceland, Europe

Rhyolite Mountains, Brennisteinsalda, Landmannalaugar, Highlands, Iceland, Europe

Coloured Rhyolite Mountains, Landmannalaugar, Highlands, Iceland, Europe

Colored rhyolite mountains, Graenihryggur, Landmannalaugar, Fjallabak, Icelandic highlands, Iceland, Europe

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

Boat on Lake Powell, red Navajo Sandstone cliffs behind, Page, Arizona, USA, North America

Versturzhoehle Riesenburg, natural karst cave ruin of Frankendolomite, geotope, natural monument, near Engelhardsberg, district of Markt Wiesenttal, Upper Franconia, Franconian Switzerland, Franconia, Bavaria, Germany, Europe

Sinter terraces with calcareous tuff deposits, hot springs, colorful mineral deposits, Palette Springs, Lower Terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, North America

Mather Point, South Rim, Grand Canyon National Park, Arizona, USA

Lime terraces with lakes, Huanglong National Park, Sichuan Province, China, Asia

Sinter terraces, hot springs, orange mineral deposits, Palette Springs, Upper Terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, North America

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

Chalk stratum in the chalk cliffs in the Jasmund National Park, Jasmund peninsula, Ruegen Island, Mecklenburg-Western Pomerania, Germany, Europe

Coloured rhyolite mountains, Landmannalaugar, Fjallabak nature reserve, Sudurland, South Iceland, Iceland, Europe

Detail photo, hot spring with orange mineral deposits and algae, Palette Springs, Upper Terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, North America

Rock formation in Teide National Park, Teneriffe, Canary Islands, Spain

Unique Rock Formation In South Iceland, Near The Town Of Vik, Iceland

Nepal, Upper Mustang, Landscape, Layered mountain structure near Lo Manthang city

Exterior view of the rock caves and architecture of the facade in sandstone at Al Khazneh or The Treasury at Petra, Jordan at night, A red glow with small glowing lamps on the ground, Petra, Jordan

Exterior view of the rock-cut architecture of Al Khazneh or The Treasury at Petra, Jordan, camels in the foreground, Petra, Jordan

Low angle exterior view of the rock-cut architecture of Al Khazneh or The Treasury at Petra, Jordan, Petra, Jordan

12 year old girl hiking in beautiful slot canyon Kasha Katuwe Tent Rocks, New Mexico