Great Basin National Park, Nevada
8/12Another of the nation's least-visited national parks, Nevada's Great Basin National Park offers visitors plenty of room to spread out outdoors. While park-goers will be amazed by Wheeler Peak and the park's sprawling limestone caves, the dark night skies are the ultimate reward, offering overnight visitors the rare opportunity to see planets, meteors, satellites and so much more. "On a clear, moonless night in Great Basin National Park, thousands of stars, numerous planets, star clusters, meteors, man-made satellites, the Andromeda Galaxy, and the Milky Way can be seen with the naked eye," the National Park Service states. "The area boasts some of the darkest night skies left in the United States."