These massive concrete balls were used to mine gold in Virginia.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

Once the home of a noted Civil War spy, the two-story brick house now serves as a museum.

America's post-nuclear-attack chambers of Congress.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

The original movie set for the home of 'Star Wars' hero Luke Skywalker.

Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

A roadside collection of over-sized iron creations that are a bit more macabre than most.

Just a man taking his prehistoric pet for a stroll.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

This museum glorifies the humble potato.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

A cemetery full of touching tombstones from a community of railroad workers, uranium miners, and Cold War missile launchers.

This Moab institution functions as both a rock store and a small natural history museum.

Take a dip in the world's largest mineral hot springs pool.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

Massive still life just off the highway in Kansas.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

Buy a token from the liquor store and you can make this beast spew flames on command.

Bizarre Cavern.

The "All-Seeing Eye of God" symbol on this library is a clue to one of the many former lives of this building.

This general store is more than a century old and home to various oddities and antiques.

A giant time capsule not scheduled to be cored until 2040.