The dinosaur bones at this park straddling northwestern Colorado and northeastern Utah would be reason enough to stop here. The quarry displays the remains of Allosaurus, Diplodocus and Stegasaurus, among other dinosaurs. But the monument also has excellent river rafting, hiking and ancient rock art panels.
Two visitor centers, one in Colorado and one in Utah, each have interactive displays. See the wall of bones at the Quarry Exhibit Hall and raft the Yampa River past the iconic formations such as Steamboat Rock.