This former fascist summer camp was abandoned for decades.

Fighting the British and making game shows for over 150 years.

Historic medieval fortified city in southwest France.

Notorious artist squat renovated into legal studios.

Ghosts of France's colonial past.

Abandoned railway line circling the city of Paris.

A self-built mosaic house and sculpture park.

A chapel on a volcanic core, marking the end of a successful journey.

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

A Gothic cathedral created from volcanic rocks.

Natural mummies hidden in the crypt of a medieval French church.

Statue of a decomposing prince that once held his heart in its hand.

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

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

A beautiful and classically designed villa, with an hourly infestation of monsters.

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

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

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Artist's eccentric property excessively decorated with found objects and work of his own.

Life-sized bronze statues of fictional puppet characters.

The bones of the Biblical Magi traveled to Constantinople and Milan before landing in their current home inside an elaborate golden reliquary in the Cologne Cathedral.

A small hippo-shaped fountain in Berlin, Germany.

A purr-fectly spirited bronze celebration of local street felines through history.

An astonishingly accurate water clock that doubles as an hourly spectacle in this Berlin shopping area.