Photo #24243 - Rock of the Glen View from Rock of the Glen, looking at the south side of Rock of the Glen where the early pioneers carved their names in the rock as they passed by. 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.