The geothermal areas of Yellowstone include several geyser basins in Yellowstone National Park as well as other geothermal features such as hot springs, mud pots, and fumaroles. The number of thermal features in Yellowstone is estimated at 10,000.
Old Faithful is just one of many geysers in the park. It has the advantage of being fairly regular in its eruptions and close to the park road.
Be patient and many of the other geysers are just as spectacular and you may be alone when they erupt.
The bubbling and churning mud pots fascinating to watch.
Mammoth Hot Springs has the largest and prettiest hot spring in the park,
but there are many more similar features.