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

A dream-like maze full of strange art, surreal spaces, and fantasy landscapes to get lost in.

Watch the local Netherlands birds from inside this giant eco-egg.

The tallest mountain in mainland Netherlands isn't actually very tall.

This Dutch windmill has its roots in an American invention.

A massive explosion that leveled hundreds of buildings in the city of Leiden is remembered by a waterside plaque.

An early 19th-century English style garden hidden in the Rotterdam cityscape.

Four giant movable street lights decorate this modern Rotterdam square.

This stately council chamber hasn't changed since 1545.

The place where Czar Peter I of Russia resided in 1697 during his Grand Embassy.

A preserved building where the dead were once watched for signs of life.

The largest flower auction house in the world.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

Strange secondhand shop showcasing taxidermy and oddies

Incredible labyrinth of man made caves.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

This dockworkers' lunch joint has been left leaning by a century of storm floods.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

Winter weather reveals a large Italian marble crucifix drowned beneath Lake Michigan.

The remains of 40,000 humans, meticulously stacked in a tiny churchyard shed.

Only hotel where you can legally launder money.

This Peruvian bone silo lined with hanging human skeletons and hundreds of skulls is topped with a remarkable Michelangelo replica.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.