Wrangell-St. Elias
Credit: Mark Newman / Getty Images

Located in south central Alaska, Wrangell–St. Elias is the country's largest national park at 13.2 million acres (almost six times the size of Yellowstone). President Jimmy Carter used the Antiquities Act to designate the area a national monument in 1978, before turning it into a national park two years later. One of the park's most popular destinations is Mount St. Elias, which stands 18,000 feet high and is the second tallest mountain in the U.S. and Canada. The park's other namesake, Mount Wrangell, is one of several active volcanoes in the region. Visitors will find the region is covered in more than 100 of North America’s largest glaciers including one, the Malaspina, that is larger than Rhode Island.

Don't Miss: One of the best ways to visit the park is by air. There are plenty of companies that offer small plane tours of the area, some of which will design custom flight paths based on what you want to see. Some of the most popular fly-bys are Bagley Icefield, the ruins of the Nizina Bridge, and the Sourdough Rock Glacier.