Yellowstone National Park is a 3,500-sq.-mile wilderness recreation area. It is the first national park in the world, established on March 1, 1872, the example on which parks everywhere are modeled.3
Grand Teton National Park is in the northwest of the U.S state of Wyoming. It encompasses the Teton mountain range, the 4000-meter Grand Teton peak, and the valley known as Jackson Hole. It’s a popular destination for mountaineering, hiking, backcountry camping and fishing, linked to nearby Yellowstone National Park by the John D. Rockefeller, Jr. Memorial Parkway.