Yellowstone was the first national park in the world and arguably the best and most diverse in the country, Wyoming.
Grand Canyon, Arizona/Utah is an American icon and truly grand, though not very clever, well not compared to more complex neighbours such as Bryce Canyon or Zion.
Zion Canyon, Bryce Canyon, Arches, Canyonlands, Capitol Reef – all spectacular national parks with insanely shaped rocks. Utah rocks!
Everglades, Florida- alligators, flamingos and other wetland life, with air boats to explore it.
Denali, Alaska – mountainous wilderness with bears, moose, wolves and other tough critters.
Yosemite, California- one of the nation’s most (over) popular parks for hiking and climbing. Sierra Nevada Mountains.