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

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

The world's largest reflecting pool is just two centimeters deep.

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

Lady Liberty's original designer installed a little clone in this French fountain.

A massive, secret marina for the Nazis' most formidable weapon in the Atlantic.

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

A medieval house adorned with enigmatic carvings, including one of a man displaying his masculine attributes.

Antique cinematography artifacts fill this museum dedicated to the inventors of the moving picture.

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

Monsters and miniatures are held in equal esteem at this wondrous museum.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

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

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

A beloved local artist has been honored with this statue of a man emerging from a toilet.

One of the earliest depictions of an Arthurian scene that is shrouded in mystery.