If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

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

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

This lesser-known Frank Gehry building houses a treasure trove of cinema history.

The world's tallest bridge is also possibly the most elegant.

The encased skull that is widely believed to belong to St. John the Baptist.

The approximate spot where the last Grand Master of the Knights Templar was put to death.

There has been an astronomical clock on this spot since the 14th century.

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

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

Two small chapels housed inside an ancient tree.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

The famous winding walk at Chartres is surrounded in mystery and myth.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

This Parisian gem is one of the most incredible ethnographic museums in the world.

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

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

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

This banal Parisian entranceway is not what it seems.