Hundreds of dwarf beeches create an unusual, haunting forest in the north of France.

A collection of abandoned typographic signs from Berlin and beyond.

A wunderkammer of mysterious objects and stories.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Lavish royal estate punctuated with heated greenhouses.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

A beautiful maze marks where three countries meet.

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

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

This Greek temple, open only an hour a day, was the site of a war of tastes between an architect and an artist.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.