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

France's most famous cemetery, with some of its most curious tombs.

Modern art commemorates one of the first military actions of World War II.

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

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Notorious artist squat renovated into legal studios.

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

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

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

An underground city of salt.

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

A striking public sculpture representing the period of martial law in Communist Poland.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

This extensive collection covers thousands of years of Polish military history.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

Relive a Polish uprising via an enormous, century-old cyclorama.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

This 13th century Gothic brick castle is the largest in the world by surface area.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Architectureal fantasy quarter of Rome.

Architectural monsters are devouring this palace's every door and window.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.