Yellowstone National Park is located primarily in the state of Wyoming, but also extends into Montana and Idaho in the United States. It was established in 1872 as the first national park in the world.
The park is known for its geothermal features, including geysers, hot springs, and mudpots. The most famous of these features is Old Faithful, a geyser that erupts regularly.
In addition to its geothermal and wildlife, Yellowstone offers recreational activities such as hiking, camping, fishing, and wildlife viewing. The park has several visitor centers and museums, as well as several developed and backcountry campgrounds, and a number of picnic areas, and scenic drives. It is important to note that certain park facilities and roads may be closed during the winter season due to snow. Also, it is highly recommended to make reservations in advance, as the park can get very crowded during peak season.