Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

Odd outsider art installations surround a Gold Rush-era ghost town.

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

A frozen oasis lies beneath the scorching New Mexico desert.

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

Abandoned silver mine strewn with wrecked and twisted structures.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Possibly the world's only drive-in movie theater with an attached motel.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

When ecosystems collide in the arid Southwest.

The largest source of fossilized insects anywhere.

The highest bridge in America was built for an almost unnervingly small amount of money.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

This old steel industry company town has a tradition of parking cars on the sidewalk so people can walk in the narrow streets.

The first KFC is on the National Register of Historic Places.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

One of the few working locomotive roundhouses in the United States.

This lovely public park has an intriguing past and unique wooden bridges made of concrete.

Island where motor vehicles are banned -- home to the only carless highway in the United States.