The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

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.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

Abandoned bridge hidden deep in the San Gabriel Mountains.

A surreal, Gaudi-inspired play space near an Anaheim community center.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

With over 340,000 artifacts and counting, there is something for everyone, often called the "Smithsonian of the West."

A little-visited ghost town state park offers a glimpse into Montana’s "Silver Queen."

Between Missoula and Spokane, a family-owned travel center has an unusual museum in the back.

A classic carnival ride that was carved to be untouchable.

This amazingly preserved Gold Rush town is a historian's dream.

Modeled after a famous church in Vienna, Austria—but in Helena, Montana.

The old fire tower is one of the last of its kind in the United States.

One home in the historic strip hides secret compartments and the ghostly songs of long-gone canaries.

New fungal and bacterial species call this deadly lake home.

Home to the deepest rift anywhere on Earth.

Home to a timed geyser created by complete accident.

This giant tower beacon was a key navigation tool for pilots delivering mail amid the night skies.

These century-old beehive-shaped kilns were built to produce charcoal for nearby mines.

An Idaho legend carved out a cave village with his own two hands.

See just what life was like in a 19th-century prospecting town.

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

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

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