Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

A small town built on an abandoned airfield has former runways as streets and a bar and grill in an old airplane hangar.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

An entire town preserved as a historic landmark.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

New Plymouth, Idaho is the only U-shaped town in the United States.

This granite monument at the site of an ill-conceived tourist attraction is built from the same stone as the Mormon Temple.

Derelict buildings are all that remain of a complex at the site of one of the worst mining disasters in Montana history.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

A few dilapidated structures are all that remain of this deserted former silver mining town.

The rocks of a certain area of Butte, Montana give off a musical ring when hit.

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

A miraculous natural phenomenon known as "the spring that breathes."

Where the U.S. government kept its actual treasure, before Fort Knox.

A self-explanatory attraction allows fans to respectfully remember and honor a comedy legend.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

Along the old Route 66 is an abandoned trading post made from old telephone poles, built by a former circus clown.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.