The first declared National Monument in the United States.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

This archaeological dig site and museum is home to one of the largest dinosaur fossil collections in the world.

This old-school soda shop is the home of the Tin Roof Sundae, a concoction dripping in chocolate, marshmallow, and peanuts.

Storage units with a wartime past.

This erect, phallic geological spire wasn't always named so domestically.

An experimental, automotive replica of Stonehenge.