Located in Kemmerer, Wyoming. This National Monument displays fossils (as you might expect from the name) excavated from the area. There is no fossil display outside the visitor center so this is an easy one. However, there are a few scenic hikes to enjoy if you'd like to get your sweat on, including the Historic Quarry Trail. I wouldn't go out of my way to see this again but if you're passing through anyway, make a quick stop.