Photograph of a tree reaching out to the constellation Orion in Big Bend National Park, a Gold Tier Dark Sky Park, at the Cottonwood Campground. The campground is in the park’s western corner, between the Castolon Historic District, the scenic Santa Elena Canyon, and the tail end of the Ross Maxwell Scenic Drive. The National Park Service website for Big Bend reports having the least light pollution of any other national park in the lower 48 states.