A modern reimagining of a medieval city gate.

Four giant movable street lights decorate this modern Rotterdam square.

An early 19th-century English style garden hidden in the Rotterdam cityscape.

Amsterdam's former hotspot for public executions and dissections.

A beautifully eclectic mix of architectural styles.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

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

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

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

An exquisite Baroque church in Vienna's old town.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This charming pup is meant to celebrate the youth and stubbornness of the city's students.

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

A strangely curved lamppost stands tall over this avenue in Rotterdam.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The final resting place for the remains of 143 Habsburg royalty.

The beautiful baroque library of the Hapsburg empire.

In the Netherlands, one of the world's largest private car collections can be found.

A surreal statue honoring Prague's favorite literary son.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Macabre astrological automaton clock dating to the late 1400s.