Jack Dykinga / Scalding hot water continuously spouting behind layers of mineral deposits, Fly Geyser, Black Rock Desert, Great Basin Desert, Nevada, USA

Milan Radisics / Aerial shot of steam geysers at Gunnhuver Hot Springs, Reykjanes Peninsula, Iceland, August 2018.

Milan Radisics / Aerial shot of steam geysers at Gunnhuver Hot Springs, Reykjanes Peninsula, Iceland, August 2018.

Igor Shpilenok / Kamchatka Brown Bear (Ursus arctos beringianus) by malachite (copper mineral) outcrop. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, Valley of the Geysers, October.

Jeff Vanuga / Aerial view of Grand Prismatic Springs Midway Geyser Basin. Yellowstone National Park, Wyoming, July 2011.

Floris van Breugel / A skier glides past an erupting geyser in the Old Faithful geyser basin in Yellowstone National Park. The cold temperatures in the winter cause the geysers to release more steam than usual making the...

Jack Dykinga / Scalding hot water continuously spouting behind layers of mineral deposits, Fly Geyser, Black Rock Desert, Great Basin Desert, Nevada, USA

Sergey Gorshkov / Steam emitted from geysers, Geyser River, Valley of Geysers, Kamchatka, Russia

Sergey Gorshkov / Steam emitted from geysers, Geyser River, Valley of Geysers, Kamchatka, Russia

Sergey Gorshkov / Geyser River and geysers in background, Valley of Geysers, Kamchatka, Russia

Jeff Vanuga / Bull Bison (Bison bison) warming himself in the steam from the Firehole River, Upper Geyser Basin, Yellowstone National Park, Wyoming, USA, January

Jeff Vanuga / Lone Star Geyser erupting in Lone Star Geysyer Basin at night, Yellowstone National Park, Wyoming, USA, October 2007