4. Death Valley National Park, California
Most of the spots on this list fall at Class 2 or 3 on the Bortle scale, which ranks the brightness of the night sky on a scale of 1 to 9. Class 1 is as dark as possible and Class 9 is heavily light-polluted. Class 2 and Class 3 skies are extremely dark, but much of Death Valley enjoys a true Class 1 sky, thanks to its remote location in the Mojave Desert. These skies are so dark that the Milky Way can cast shadows.
There's great stargazing all over the park, but if you're looking to ensure a Class 1 experience, consider heading to Ubehebe Crater in the park's northern reaches.
AAA Diamond hotel pick:
The Inn at Death Valley | More Diamond hotels near Death Valley