Yellowstone National Park Royalty-Free Stock Photo

This was shot in Yellowstone National Park in July, 2009. The tourists are walking on the boardwalk to observe geothermal features of the national park. With half of the earth’s geothermal features, Yellowstone holds the planet’s most diverse and intact collection of geysers, hot springs, mudpots, and fumaroles. Its more than 300 geysers make up two thirds of all those found on earth