Yellowstone National Park, the first national park in the U.S. and the world, is primarily located in Wyoming, though it extends into Montana and Idaho.

Yellowstone National Park, established in 1872, is widely recognized as the first national park in the world. Located primarily in Wyoming, with smaller portions in Montana and Idaho, it spans over 2.2 million acres. The park is renowned for its dramatic geothermal features like Old Faithful Geyser, colorful hot springs, and bubbling mud pots. In addition to its unique geological features, Yellowstone is home to diverse wildlife, including bison, elk, grizzly bears, and wolves. The park's landscape includes vast forests, rugged mountain ranges, and picturesque lakes, making it a treasure trove for outdoor enthusiasts and nature lovers.