The hidden lair of an alchemist rediscovered in a 2002 flood.

The ruins of a medieval bridge are visible inside a Prague Metro station.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

A beautiful window with the old Tesla Radio company logo.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

Monument to a suicide protesting the Soviet invasion.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

Walk through Czech history in Prague's largest graveyard.

A controversial artwork draws attention to the dark history of Prague's "Suicide Bridge."

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

A Baroque mansion with ties to legendary magicians and alchemists.

A living archive of thoughts in motion.

This mountain clearing, created during World War II for an oil pipeline, provides a view of NYC from 40 miles away.

The name doubles as an appropriate adjective for this small ossuary.

A park dedicated to the titular writer filled with references to his work.

Celebrating the Eucharist, the day is a legal holiday in many parts of Germany.

A memorial dedicated to those who lost their lives working in what is now a massive tourist attraction.

Cell phone tower constructed entirely of wood.

A hole in the floor of this chapel is said to have been created by a footprint of the devil.

A carved grave marker from the 2nd century is mounted in the alcove wall of this Bavarian church.

The prison where Hitler wrote "Mein Kampf," and 278 Nazis were later executed for war crimes.

A graveyard and memorial chapel for victims of leprosy.

The world's first jet-powered aircraft were assembled by the Germans in this secret factory in the forest during WWII.