Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A gorgeous gilded tower houses what may be the world's largest collection of gin.

The only surviving fragment of the lost Narragansett Pier Casino.

This oak sculpture at the edge of a small woodland is nine feet tall and shrouded in mystery.

The tiny airport in remote Newfoundland that inspired a hit musical is also a modernist architectural gem.

The fictional star of "Breaking Bad" is memorialized with a real-life gravestone in his hometown.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

Taste the white whiskey that the United States' first president once distilled and enjoyed.

The only parking meter in the entire town, it is surrounded by 100 free spaces.

The first spinning jail built in the United States is the only one that still turns.

The medieval-looking hammer beam teak roof may be a Victorian vanity, but it's still absolutely magnificent.

The sign at the garden gate reads: "These Plants Can Kill."

This restaurant was removed from the famed sister ship of the Titanic and placed within a hotel.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

All that remains of a gigantic earth-moving machine.

The show's fictional Korean medical camp was created in the Santa Monica hills.

Exact replica of the ancient monument, but much, much lighter.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

New Zealand's only running funicular railway.

The strange and snarky traditions of the lumber industry's fraternal order began with five men waiting for a train here in Arkansas.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.