Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

The tiny Belgian town's ancient version of Mardi Gras involves eerie wax masks, sticks for warding off evil, and ostrich plume hats.

Housing the groundbreaking maps and globes of Gerard Mercator.

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

This bike path was sunk below water level for maximum wonder.

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

A fantastical bed and breakfast with magically unique rooms.

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

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

Lombardy poplars planted to imitate the size and shape of the Cathedral of Notre-Dame de Reims.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

Unchanged for centuries, this medieval library keeps its books in chains.

A monument hidden in the woods built in 1938 as a getaway for a Dutch museum curator.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

A beautiful maze marks where three countries meet.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

Ancient man-made caves underneath small town Belgium.

This abandoned Belgian fortress is purposefully being left to nature.

Hiding the longest subterranean river known in the world.

The giant scales in this museum can still tell if someone is one of the devil's brides just by weight.