A beautiful maze marks where three countries meet.

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

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

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

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

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

A luxury hotel housed in a former 15th century Gothic church.

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

Incredible labyrinth of man made caves.

This ancient market is often referred to as the oldest shopping mall in the world.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

This house's itty bitty size means no humans allowed.

The streets of a sleepy Spanish town proudly exhibit some of the world's finest graffiti.

This abandoned viewing platform has become a monument to unnecessary government spending.

This architectural oddity is an oasis of green on the outskirts of Valencia.