Explanation:

Yellowstone National Park, established in 1872, is widely recognized as the world's first national park. Located primarily in the U.S. states of Wyoming, Montana, and Idaho, Yellowstone is renowned for its geothermal features, including Old Faithful geyser, as well as its diverse wildlife such as grizzly bears, wolves, and bison. The park's establishment set a precedent for the conservation of natural and cultural heritage worldwide.