5. Adirondack Park
Northville, New York
Part state park, part forest preserve, and part privately owned land encompassing 102 towns and villages, Adirondack Park is massive. Totaling 6.1 million acres, America's biggest state park is larger than Yellowstone and Yosemite combined. Nearly half of the land is owned by the State of New York and designed as "forever wild," encompassing all of the Adirondacks' famed 46 High Peaks as well as 3,000 lakes and 30,000 miles of river. So pack up the canoe or kayak, get ready to scale Mount Marcy, or simply meander about its 2,000 miles of hiking trails. You're gonna be here a while.