A meow-velous tribute to a beloved street cat, made famous on the internet.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

1513 Turkish world map, full of European state secrets and snarky commentary.

A sixth-century Byzantine cistern hidden below a modern carpet store.

Quite possibly the oldest love poem known to humankind.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

The attic of a four-century-old canal house hides a clandestine church.

The history and future of cannabis.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

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

This non-profit theatre in the heart of Brussels is dedicated to hosting independent films.

Ancient man-made caves underneath small town Belgium.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

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

Hiding the longest subterranean river known in the world.

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

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

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

Made of 41,900 pieces of mosaic, it took two years to piece together this giant egg.

Amsterdam's Red Light District leaves little to the imagination.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

Amsterdam's former hotspot for public executions and dissections.