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

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

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

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

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

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

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

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

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

Despite being considered a thoroughly American sport, basketball's oldest surviving playing field is found in the basement of a Paris YMCA.

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

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

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

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

An aluminum skeleton brings Chinese mythology to the French shore.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

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

Do these monsters look familiar? The gargoyles on this church are all from pop culture.

Historic medieval fortified city in southwest France.