Long tunnels run under the ancient chariot racing circuit to the tower.

Touching the iron railings of Tarragona's balcony to the Mediterranean is said to bring good luck.

This Roman arena once played host to bloody gladiatorial battles.

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

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

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

One of the oldest and largest wooden churches in France was very evidently constructed by shipbuilders.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A spectacular cave and a beguiling lake.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

Dedicated to the man who saved hundreds of children from Nazi-occupied Czechoslovakia.

An architectural marvel that combines Gothic architecture with Indian elements.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

A highly-criticized monument in Budapest has become the site of a makeshift Holocaust memorial.

This dazzling wooden church was constructed as part of an elaborate peace project after the Thirty Years' War.

A collection of old neon signs from all over Poland line a secluded courtyard.

The largest and best-preserved rotunda in Prague.

The medieval "Bearded Man" relief still serves as a clever flood warning marker.

Two stunning 17th-century libraries and a cabinet of curiosities.

A quasi-futuristic roof sits atop a medieval Bohemian monastery damaged during World War II.

A historic and beautiful Art Nouveau chamber in a historic railway station.

A colossal statue of a woman hugging a modern building.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

Countless grotesque faces stare out from this eerie Prague art wall.