911-6886 - Bubbling mud pools in the geothermal area of Hverir near Myvatn, Northern Iceland, Polar Regions

832-15929 - Champagne Pool, hot springs, geothermal area Waiotapu, Rotorua, North Island, New Zealand

832-9494 - Detail, Abyss Pool in West Thumb Geyser Basin, Yellowstone National Park, Wyoming, USA

832-9496 - Morning Glory Pool in Upper Geyser Basin, Yellowstone National Park, Wyoming, USA

797-7721 - New Zealand, North Island, Rotorua Thermal Pools with Maori girls in traditional dress

832-9497 - Morning Glory Pool in Upper Geyser Basin, Yellowstone National Park, Wyoming, USA

832-7050 - Break of dawn at the waterside of Yellowstone Lake, Yellowstone National Park, Wyoming, USA, United States of America

832-7695 - Mud pool in the Namafjall geothermal area at Lake Myvatn in Iceland, Europe

832-375 - A Japanese Macaque, Snow Monkey (Macaca fuscata) in a thermal pool, Joshinetsu Kogen National Park, Japan, Asia

832-11118 - Blahver, blue spring, the most beautiful blue water pool in Hveravellir in the Highlands, in front of Oeskjuholt, a steaming calc-sinter mound which looks like a mini volcano, below a rainbow, Hveravellir, Iceland, Europe

832-11117 - Blahver, blue spring, the most beautiful blue water pool in Hveravellir in the Highlands, in front of Oeskjuholt, a steaming calc-sinter mound which looks like a mini volcano, below a rainbow, Hveravellir, Iceland, Europe

832-11119 - Blahver, blue spring, the most beautiful blue water pool in Hveravellir in the Highlands, in front of Oeskjuholt, a steaming calc-sinter mound which looks like a mini volcano, below a rainbow, Hveravellir, Iceland, Europe

834-2860 - Champagne Pool, Rotorua, Waiotapu Thermal Area, North Island, New Zealand, Pacific

834-2861 - Champagne Pool, Waiotapu Thermal Area, Rotorua, North Island, New Zealand, Pacific

814-1331 - The thermal station of the small town of Luxeuil-les-Bains, Franche Comte, France, Europe

746-69882 - Bagni di Pisa, Terme di San Giuliano, Pisa, Toscana, Italy

746-69880 - Bagni di Pisa, Terme di San Giuliano, Pisa, Toscana, Italy

797-4009 - NEW ZEALAND NORTH ISLAND ROTORUA THE CHAMPAGNE POOL OF WAI O TAPU THERMAL WONDERLAND.THE SPRING IS 65 METRES IN DIAMETER AND 62 METRES DEEP.THE POOL WAS FORMED 700 YEARS AGO BY A HYDROTHERMAL ERUPTION.VARIOUS MINERALS ARE DEPOSITED AROUND THE SURROUNDING SINTER LEDGE OF THE POOL PRODUCING MANY DIFFERENT COLOURS. Antipodean Oceania

252-11359 - Japanese macaque (Macaca fuscata) (Snow monkey), mother and baby soaking in hot thermal spring pool, Joshin-etsu National Park, Honshu, Japan, Asia

581-2535 - Champagne Pools steaming, Waiotapu thermal reserves, Rotorua, North Island, New Zealand

485-9500 - Beauty Pool in Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

581-2537 - Champagne Pools steaming, Waiotapu thermal reserve, Rotorua, South Auckland, North Island, New Zealand, Pacific

741-47 - Thermal pool of Bagno Vignoni, Val d'Orcia, Siena province, Tuscany, Italy, Europe

29-69 - Blisters measuring about 10 cm across in boiling mud pool, Mud volcano, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

581-2074 - Steam and bubbling mud pools in thermal area, Rotorua, South Auckland, North Island, New Zealand, Pacific

752-515 - Glory Pool Yellowstone National Park WY

746-9097 - Outdoor thermal pool with hydromassage, Porto Mannu thalassotherapy centre, Palau, Sardegna, Italy

746-9089 - Outdoor thermal pool with hydromassage, Porto Mannu thalassotherapy centre, Palau, Sardegna, Italy

746-9105 - Outdoor thermal pool with hydromassage, Porto Mannu thalassotherapy centre, Palau, Sardegna, Italy