Inside houses a vast collection of military aircraft and missiles spanning the ages.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

A beautiful oddities shop crammed with strange and morbid curiosities.

Strange physical sensations and optical contradictions keep visitors coming back for more.

The world's largest fully steerable radio telescope.

A memorial for an outsider theorist who believed that the planet is actually hollow.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

The entrance to this sinisterly named tunnel hides behind a Tim Hortons.

An abandoned asylum incorporated into a college campus.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

Take a drunken tour inside the world's largest known geode.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

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

This shallow cave got its name from copious amount of human bones found inside.

A number of gruesome unsolved murders have turned this simple home into a morbid tourist trap.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

A Muppet museum in small-town Mississippi honors the roots of Jim Henson's most beloved creation.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

Alexander Milliner, a favorite of General Washington, is interred at Mt. Hope Cemetery along with 80 other Revolutionary War veterans.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Petrified footprints of one of the very first vertebrates to walk on land.

What was once the largest mine in North America has left behind a hollow hill filled with bright blue waters.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.