2 Best Sights in Cheyenne, Laramie, and Southern Wyoming, Wyoming

The second largest active sand dune field in the world, these otherworldly mountains and valleys of sand stretch for more than 100 miles. Pay attention to signage: some areas are friendly to off-roading, while others are federally protected and do not allow motorized vehicles. The ADA-accessible Killpecker Sand Dunes Open Play Area Campground is located 32 miles north of Rock Springs and has a vault toilet and fire rings.

The herbarium focuses on Rocky Mountain plants, but also includes other examples of flora from the northern hemisphere. But don't expect any living plants here. This is a working dry plant research facility, and features 1.3 million specimens mounted on paper. Visitors are welcome to take a tour.