Series of underground houses inhabited continuously for centuries.

A small town hallucinates en masse - Bad bread, or CIA science project?

One of the greatest maze designer’s greatest mazes.

Live-in sculpture begun by one family in 1979.

Nicknamed the "Museum of Horrors," this French anatomical collection has been fascinating visitors for over a century.

A bizarre sculpture garden in the south of France.

Hundreds of hidden passageways weave through the old quarters of Lyon.

A tiled, multi-level garden of survival in Lyon.

An art world insider finds himself battling for his artistic home.

The bizarre home and sculpture garden of an eccentric artist.

An architectural oddity of six stories, accessed by graceful ramps.

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

Ancient paintings known as the "Sistine Chapel of Cave Art."

Artist and musician Will Menter creates musical sculptures.

A garden of massive sculptures sits in Jean Lindard's backyard.

Fur-lined metal pod dangling in the French countryside.

Exquisite examples prehistoric bas-relief carvings.

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

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

Museum preserving torture methods from the past.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A curious collection dedicated to human and animal anatomy and pathology.