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

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

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

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

A Gothic cathedral created from volcanic rocks.

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

This museum houses an imposing skeleton army comprised of creatures great and small.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

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

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

A statue of the second-tallest Dutchman in history.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

A modern reimagining of a medieval city gate.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

Famously misunderstood wonder of the ancient world

The first archaeological site discovered by aerial photography.

The oldest working mechanical clock in the world.

England's most notorious suicide spot.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

Regency-era excess on the English Coast.