Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

This Belgian theme park began as a refuge for bored church children and was closed down when a boy lost an arm.

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

This old, abandoned hotel offers magnificent views.

The world's tallest boat lift stands as a massive piece of industrial tourism.

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

Six turbines towering over a wide road for passersby.

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

This collection of solar timekeepers includes the world's first digital sundial.

This bike path traverses the treetops.

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

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

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

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

Only museum in the world devoted to bookbinding and book arts holds a permanent collection representing five centuries.

An undulating wicker beast looms peacefully atop a sand dune in Belgium.

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

The Belgian library displays burned books that were salvaged from the fires of both world wars.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

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

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

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Lavish royal estate punctuated with heated greenhouses.

A plaque pays tribute to the artist's longtime London home.