Abandoned since 1998, this train station has become an oasis for urban explorers.

This mine is home to the largest man-made hole in Europe.

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

This mysterious pig iron pillar does not rust, despite being weathered by the elements for centuries.

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

This German art chapel is perfect for those who like their worship hard, modern, and utterly alien.

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

A little sculpture with a large wardrobe.

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

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

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

The highest point in Belgium is a staircase to nowhere.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

A beautiful maze marks where three countries meet.

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

The tallest mountain in mainland Netherlands isn't actually very tall.

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

This historical Netherlands fortress still bears the marks of its single siege.

Incredible labyrinth of man made caves.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.