Wrangell-St. Elias National Park

 Size:53,321 sq. km.

Located in southern Alaska, this U.S. National Park has also been designated a UNESCO World Heritage Site, and is included in an International Biosphere Reserve. It is the largest national park in the United States by area, and is larger than nine states. Located in the park, Mt. St. Elias is the second highest mountain in both Canada and the United States; nine of the 16 highest peaks in the U.S. are located in the park.