A once-magnificent collegiate church is falling into ruin.

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

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

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 Cold War command center is hidden under an idyllic countryside.

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

This modern arts center is built around a gem of late-Baroque architecture.

An open-air sewer system that was covered piece-by-piece over 300 years.

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

Ancient man-made caves underneath small town Belgium.

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

This abandoned Belgian fortress is purposefully being left to nature.

One of the deepest indoor swimming pools in the world.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

Hiding the longest subterranean river known in the world.

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

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

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

The Devil’s own choice when he needs a drink in Brussels.

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

Lavish royal estate punctuated with heated greenhouses.

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

Bring your hiking shoes, wool socks, and thermal underwear for a stay in these cozy forest huts.

Ruins of a German Castle on top of a towering stone pillar.