The Yellowstone region is located primarily in the U.S. state of Wyoming, with parts extending into Montana and Idaho. It is home to the first national park in the world, Yellowstone National Park, established in 1872. The area is known for its stunning landscapes, including mountains, forests, and geothermal features like geysers and hot springs. The region is rich in biodiversity, hosting a variety of wildlife such as bison, elk, and grizzly bears. The park's unique geology is shaped by volcanic activity, with the Yellowstone Caldera being one of the largest active volcanic systems. Visitors come to enjoy outdoor activities like hiking, camping, and wildlife viewing.