Belgium’s famous peeing statue has worn many hats (and coats, and pants), which are on display at this small museum.

One of the deepest indoor swimming pools in the world.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

Meet the bronze beloved pet to a family of famous peeing statues.

Cozy basement bar sports an inventory of over 2,000 beers.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

An unsettling sculpture of a boy hanging out in a street in Ghent has been baffling visitors for years.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

This interactive sculpture allows visitors to leave a message in case a friend passes by.

To enter this cluttered-yet-cozy sanctum of Belgian brews, ring the bell and tell the gatekeepers you've come “to taste beer.”

This small corner bar is home to a rare 1930s dance organ that still plays tunes for one Euro.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

A Japanese video game arcade hides in the back of a Swedish pool hall.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Stockholm's deepest subway station is also a stunning ecological wonder.

It houses the remains of a 17th-century version of the Titanic.

This Stockholm light tower can be controlled by anyone with a smartphone.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.