A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

This island castle contains enough secret passageways to support a season of Scooby-Doo episodes.

A home that witnessed Civil War combat on the Sunken Road has the battle scars to prove it.

This aluminum airplane pays homage to the Flying Tigers of World War II.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

Believed to be haunted, this old cemetery is beautifully adorned with Spanish moss hanging from the trees.

Where beautiful signs live on forever.

A singular collection of hand-built art deco cars are held in a building with style to match.

Halloween spirit is alive and well in this small town, where residents race motorized caskets in a yearly tradition.

Learn about the history and craftsmanship of carousels inside this museum located in a former post office.

The overgrown remains of an old rail bridge rise above the valley like ancient Greek ruins.

The last early 20th-century schoolhouse in Fairfax County has galvanized the community and engendered a spirit of service among residents.

From a supper club to a gay bar to an HBO shooting location, this 125-year-old Victorian mansion has lived many lives.

The only Native American comic shop in the world.

These small house replicas have stood proudly since the 1950s, even as the property has changed hands.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This fairytale-inspired cottage was created by a university literature professor.

The bottle house obsession struck a Florida man in his retirement, and now he can't stop building.

This eclectic, mosaic-clad home includes a bamboo ping-pong loft and a "Whispermaphones" intercom.

One man's ambition created this psychedelic log home.

This iconic science fiction house still looks like something from the future.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

A frozen oasis lies beneath the scorching New Mexico desert.