This historic Amsterdam bar used to accept sailor's monkeys as payment.

The last of Amsterdam's original sea level markers remaining in place.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

Amsterdam's former hotspot for public executions and dissections.

A unique work of automotive art calls this shopping center home.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

A public urinal so pretty, it was declared a national monument.

A comedic homage to a beloved German actor.

This German monument honors the so-called "Prince of Mathematicians."

After this historic church was destroyed by World War II bombing, its blackened shell was left standing as a monument.

Striking occult iconography on a medieval German church.

This gateway to subterranean Hanover plays jazz, pop and rock to surprised passersby.

It commemorates one of the world's earliest telegraphs.

A 1:2 billion-scale solar system leads visitors into this German university town.

The man who gave his name to magnetic measurement is buried in the city where he did his best work.

The Goose Girl of Göttingen, Germany might well be the most kissed girl in the world.

One of the oldest student jails in Germany.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

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

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.