Inside this church are the alleged remains of the patron saint of lovers, epileptics, and beekeepers.

A saintly relic hidden in a Prague church basement.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

Abandoned bridge hidden deep in the San Gabriel Mountains.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

A railway bridge leading nowhere stands lonely in the middle of a meadow.

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

An abandoned suspension bridge on the Falkland Islands is crumbling into the water.

At high tide this strange footbridge appears to have no purpose whatsoever.

The ritual has been performed uninterrupted for nearly 700 years.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

There's an exclusive Beefeaters pub hidden in the Tower of London.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

Double spiral staircases are not unheard of, but they are very rare.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.