[an error occurred while processing this directive]
4 of 11
Photograph by Michael Quinton, Minden Pictures
Born of frozen thermal steam, a frosty fairyland glazes the world of Mammoth Hot Springs. Deposits of a white mineral, travertine, were created by Yellowstone's volcanic plumbing—a hot spot active for two million years. That heat feeds some 300 geysers, the greatest concentration on Earth.
