Started as a kitchen garden, now the second largest botanical garden in the world.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Climb inside an iron crystal magnified 165 billion times its normal size.

One of the great treasures of Neolithic art lies within this carefully constructed pile of rocks.

An intricately decorated tiny place of worship.

Folklore and history carved into Brittany's coast.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

Two small chapels housed inside an ancient tree.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

France's most famous cemetery, with some of its most curious tombs.

A self-built mosaic house and sculpture park.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

Jean Tinguely's bizarre monster sculpture is hidden deep in a forest.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The vast, legendary catacombs hold secrets much stranger than stacked bones.