This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

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

Solitary monument dedicated to the beauty of nature.

Ruins of a German Castle on top of a towering stone pillar.

The silly symbol for an underground protest group is now scattered around the city.

During World War II, this rice mill became a Nazi concentration camp.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

Where the lovelorn find a home for their sentimental keepsakes.

A beer pipeline runs beneath Bruges.

Explore 400,000 years of humans' "battle against darkness" in this offbeat but thorough lamp museum.

A Museum of Psychiatry in a still-operating mental institution.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

It has an American Dream Car exhibit, Europe's largest Formula One collection, and many, many mannequins.

It's good luck to be mocked by this monkey.

A preserved college lock-up that recalls a clubhouse approach to discipline.

Terrifying derelict military hospital once housed a recuperating Hitler.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

This community on a small Venetian island has taken to painting their houses in bright neon hues.