Yellowstone
#1 in Best U.S. National Parks
Even if Yellowstone didn’t hold the incredible distinction of being the world’s first national park, the 2.2 million-acre park could easily stand on its own for its unique natural attractions and diverse geography. What’s more, this behemoth national park stretches across three states: Wyoming, Montana and Idaho. Here, travelers can get lost in the splendor of Yellowstone’s many lakes, mountains, buffalo-filled valleys and, of course, its unmatched geysers and hot springs. To avoid the crowds that often plague the park, plan to visit in April, May, September or October.
Yosemite
#2 in Best U.S. National Parks
California’s most-visited national park stands out for its bevy of impressive waterfalls, such as Vernal Fall and Bridalveil Fall, as well as unique granite rock formations like Half Dome and El Capitan. There are ample scenic hiking and camping opportunities in Yosemite National Park as well. Whatever your itinerary may be, make sure to stop by the Tunnel View Outlook, which offers a show-stopping panoramic view of Yosemite Valley. What’s more, the picturesque lookout spot is relatively easy to access.