Preserved within Yellowstone are Old Faithful Geyser and some 10,000 hot springs and geysers, the majority of the planet's total. These geothermal wonders are evidence of one of the world's largest active volcanoes; its last eruption created a crater or caldera that spans almost half of the park.

An outstanding mountain wild land with clean water and air, Yellowstone is home of the grizzly bear and wolf, and free-ranging herds of bison and elk. It is the core of the Greater Yellowstone Ecosystem, one of the largest intact temperate zone ecosystems remaining on the planet.

Wildlife is plentiful to the point of creating traffic jams when they choose to use the road...

Link to   Yellowstone National Park