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

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

The foundations of a forgotten fortress, wedged in between two streams.

A fascinating and enormous collection of natural history exhibits stained by a dark colonial legacy.

This old, abandoned hotel offers magnificent views.

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

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

This memorial museum chronicles the apocalyptic destruction of the First World War.

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

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

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

A moving memorial to the fallen and missing from WWI trenches.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

Housing the groundbreaking maps and globes of Gerard Mercator.

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

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

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

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

The highest point in Belgium is a staircase to nowhere.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

This abandoned Belgian fortress is purposefully being left to nature.

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

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.