This 14th century wine cellar is home to the oldest barrel-stored wine in the world.

Legend has it this 11th-century castle was paid a visit from the devil.

Series of underground houses inhabited continuously for centuries.

This otherworldly French waterfall looks like its waters have turned to stone.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

An unsettling shrine dedicated to the ravenous beast that prowled 18th-century France.

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

This ancient theater was once the home of fierce gladiatorial battles.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

The construction of a tram line unveiled hidden remnants of the old medieval city.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

A unique underground structure dating back to the 1st century BC.

This bridge was constructed from the rubble of the infamous Bastille.

A centuries-old complex of hand-dug stone chambers has sheltered locals in times of trouble.

The Argonaute submarine was the French navy's pride and joy in the 1950's.

The 16th-century church was kept in its ruined state as a reminder of the casualties of World War I.

A colossal sculptural lion built by the same man who designed the Statue of Liberty.

One of the world's most complex timepieces.

Bits of architecture from a town destroyed in World War I now decorate this hotel garden.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

The Church of the Annunciation was carved into the face of a cliff, just like the rest of the town of Haute-Isle.

The deserted pirate-themed restaurant still entices explorers.