You would never come across this tiny green oasis if you didn't know it existed.

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

This bike path traverses the treetops.

Descend into the tunnels to experience the life of a coal miner.

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

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

The highest point in Belgium is a staircase to nowhere.

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

A fantastical bed and breakfast with magically unique rooms.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

Artwork tucked within the trees greets visitors with surreal sonic experiences.

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

This Greek temple, open only an hour a day, was the site of a war of tastes between an architect and an artist.

A rare example of World War I trenches from the British front.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

Medical history with an amazing, if frighting, collection of wax diseases on display.

Theme park featuring miniature replicas of European monuments.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

Hiding the longest subterranean river known in the world.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

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

This ghost town in Belgium will lose its street art when it ceases to exist.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."