Photo #24454 - Roadside turnout with historic information sign Wild Horses are often seen to the north of Bridger Butte. Today's wild horses are descendants of animals that escaped or were turned loose by various cultures who depended on them 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.