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

This secret cemetery where no flag is allowed to fly holds the bodies of American soldiers convicted of heinous crimes during WWII.

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

This abandoned Belgian fortress is purposefully being left to nature.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

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

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

A medieval gate once used as a prison and how home to a city museum.

This "social palace" housing complex created a relatively stable and self-contained worker's society... for a time.

Theme park featuring miniature replicas of European monuments.

Climb inside an iron crystal magnified 165 billion times its normal size.

Medical history with an amazing, if frighting, collection of wax diseases on display.

When you're a great Russian Tsar, even your vomit gets a statue.

This small window display is dedicated to the noble carrot.

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

Burbling away in refrigerators are 105 sourdough starters from around the world.

Two standing giants remain as a tribute to Luxembourg's metallurgical past.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

This former coal mine, now a fascinating museum, was the site of Belgium's worst mining disaster.

This small red school was where Germany signed their surrender during WWII.

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

A visionary precursor to the Internet made of index cards.