1. Central Idaho Dark Sky Reserve | Sun Valley, ID


Spanning more than 1,400 square miles across Idaho, the Central Idaho Dark Sky Reserve makes up one of the largest “pools” of natural nighttime darkness in the U.S. You can take in the stars from many parts of the state. Still, one of the best is vacationing in Sun Valley or Ketchum. Throughout both towns, you’ll find themed dark sky dinners and events where you can learn about the stars and even speak to local astronomers.
Pricing: Free
Time Out tip: If visiting in winter, plan accordingly—some roads may be closed.