A fortress built to pacify local uprising that had a stint as a Nazi concentration camp before becoming a five-star hotel.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

This man-made mound monument was built out of soil from all across the Polish empire.

This grubby wall is said to be one of the Earth's esoteric energy centers.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Real bones which are said to have belonged to a Polish dragon.

Italy's "New Mountain" rose from the ground in a volcanic eruption in 1538.

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

A sulfuric hellscape in southern Italy.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

The walls and streets of the ancient city are peppered with penises.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

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

In France, a medieval-style home pays homage to an intrepid explorer who discovered Québec.

On this romantic tidal island reachable only at low tide the tomb of a famous French writer overlooks the sea.

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

This beautiful 19th-century temple stands atop the ruins of its predecessor.

A serious museum dedicated to two German comedians.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

Daily jousts and dancing barrel makers in Munich's mechanical clock.