A Nesting Doll of Churches.

This large, circular tomb is the final resting place of the first emperor of Rome.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Jesus' footprints and the first catacombs in the world.

The final resting place of the poets Shelley and Keats.

The celebrated eyesore created by starry-eyed sweethearts.

Reminiscent of a termite mound, this imposing structure is likely an ancient funerary monument.

The only remaining vespasienne in Paris is a (stinky) relic of Resistance.

Among Europe’s most spectacular Ice Age painted caves still accessible today.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

The huge golden reliquary of a testicle-smashing saint.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

This church sits upon a peaceful hill and a long, turbulent history.

Peeing dogs guard the Roman hunting goddess atop a fountain at France’s Château de Fontainebleau.

One of the most powerful religious centers in the Middle Ages, dubbed the founder of Western monasticism.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

Site of one of World War I's most horrific scenes.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.

A swath of France so devastated by war it is still forbidden to go there.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.