Watching Old Faithful erupt is a Yellowstone National Park tradition. People from all over the world have journeyed here to watch this famous geyser. The park’s wildlife and scenery might be as well-known today, but it was the unique thermal features that inspired the establishment of Yellowstone as the world’s first national park in 1872.
Yellowstone's Midway Geyser Basin may be small, but it packs a big punch: In addition to Grand Prismatic Spring, see Excelsior Geyser, an enormous geyser crater, Turquoise Pool, and Opal Pool. You can get up close by strolling across the Firehole River and along the short boardwalk that snakes through the thermal area.