This deceptively beautiful island was once home to a German concentration camp and known as "Death Island."

Welded sphere dropped from space.

A public display of prehistoric space rocks is named for the Namibian village where they were found.

Named after the German word for "a longingness to travel," this park brings together thousands of city and street signs from around the world.

The world's oldest rose is so tough it survived being bombed in World War II.

This collection of French root art looks like an indoor fairy wonderland.

The remains of this castle, known as the Witch’s Eye, watch over the Thur Valley.

This precariously perched fortress was once ruled by a crow-worshipping baron.

World's largest permanent maze made of 18,000 conifers.

Countless grotesque faces stare out from this eerie Prague art wall.

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

Obscured within a ring of trees, this abandoned World War II relic hides on a German hillside.

Building Men of War and Indiamen from Holland's Golden Age.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

A popular day's outing in Bovington consists of watching military tank driving practice.

Crumbling ruins of the thermal baths that once attracted royals and aristocrats from throughout Europe.

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

These picturesque ruins crumble beautifully into the ocean.

A sturdy relic of Britain's once crucial gunpowder industry is now a haunting Cornish ruin.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

The Cathedral of St. Ambrose has been hiding a special parishioner within its walls.

A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.