Where condemned pirates met their grisly end at the gallows on the River Thames.

Known as the "Fat Man of Maldon," Bright was a larger-than-life figure.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

A submerged archeological park still holds the wonders of a Roman Sodom.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

Rebuilt remains of a temple to Roman god Mithras.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

The curious underground history of keeping Paris clean.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

Don't be fooled by this fake medieval facade even if it is almost 300 years old.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

Abandoned bridge hidden deep in the San Gabriel Mountains.

A lavish 16th-century mansion filled with spectacular staircases, fantastic frescoes, and gorgeous gardens.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

Built to test magnetically levitated elevators, the tower also boasts Germany's highest visitor platform.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

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

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

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