The former home and studio of Belgian artist Antoine Wiertz is now a museum dedicated to his work.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

A tiny metropolis resides inside this student housing complex.

A reconstructed World War I-era communications array that was once hidden in plain sight.

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

Forget the hearse ‘cause he’s forever immortalized in a Belgian city where AC/DC performed a secret gig that pushed them forward.

The private train station King Leopold II built for the Belgian royal family now lies abandoned.

The foundations of a forgotten fortress, wedged in between two streams.

Rediscovered in 1992, this abandoned medieval village once flourished by fishing and piracy.

The oldest cemetery in Belgium.

After the construction of a nearby cathedral obstructed the view, the oldest belfry in Belgium was more than doubled in height.

Stocking up on the world's best beer requires a pilgrimage to a monastery drive-through.

What was once a bustling mining installation is now a bustling hub of contemporary art.

A giant bug impaled on a 75-foot-tall needle.

A collection of weird and wonderful art fills a former houseplant nursery.

This charming, hidden guild museum holds some 700 years of crossbow history.

A Cold War command center is hidden under an idyllic countryside.

Take a leisurely walk through the park to find the seven giant troll sculptures hidden throughout the park.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.

This bike path traverses the treetops.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

Because sometimes you need to make a batch of frites even when the stores are all closed.