A museum packed with instruments, lyrics, and other mementos of the American folk icon.

A UFO scrapyard in the California desert.

The mysterious 855-foot zigzagging stone wall has been baffling people for centuries.

More than 200 unconventional musical instruments that anyone can play.

The modest, restored home of the legendary ragtime musician John William "Blind" Boone.

A gem in the small Missouri town where Winston Churchill coined the term "Iron Curtain" and effectively began the Cold War.

The obelisk meant to mark the founding father's grave at Monticello is actually on the University of Missouri campus.

A hidden beach at the end of a tunnel of mangrove trees.

A replica of one of the more than 15,000 civilian lookout towers that lined the U.S. coast during World War II.

This small piece of railroad history sits behind the parking lot of a chain grocery store.

A Florida college boasts the world's largest single-site collection of structures designed by Frank Lloyd Wright.

Though nicknamed the “Russian Freighter,” this ship was actually sunk off the coast of Pensacola by the U.S. government in a top-secret operation.

Located within a historic park, the beacon is the oldest standing structure in Miami.

The wood bears a hidden love note carved by a young Johnny Cash.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

A shrine to a skeleton saint in the city of angels.

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.

Amazingly detailed marble cinerary urns that once held the cremains of Roman elite.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

An exquisite grouping of structures made from 10 tons of invasive saplings.

This hidden sculpture garden full of Wild West art is one of San Antonio's best-kept secrets.