Skywatchers can see the beauty and vastness of the nighttime skies in these dark sky-designated parks.
The national park is full of steaming vents, snowy trails, diverse wildlife, colorful wildflowers and heavenly night-sky views.
The world's richest quarry of dinosaur fossils is located in the American West, at Dinosaur National Monument.
Arizona's Grand Falls are dry most of the time. But during spring runoff, the water runs like chocolate.