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

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

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

Six turbines towering over a wide road for passersby.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

Most prolific publishing house in the 1600s open to the public.

Theme park featuring miniature replicas of European monuments.

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

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

A giant bug impaled on a 75-foot-tall needle.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

A massive, secret marina for the Nazis' most formidable weapon in the Atlantic.

A unique form of erosion created an uncanny landscape of boulders perched atop slender columns of clay.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A pilgrimage site where people ask Saint Dymphna to watch over those who are not of sound mind.