Eighty million natural history specimens call this gargantuan museum home.

Catacombs turned marketplace.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This amended headstone marks the grave of a participant in one of the most successful military deceptions of all time.

This one-of-a-kind archeological site is home to strange prehistoric ruins, the original use of which is still a mystery.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Sausages, schnitzel, and weiners.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

A geothermal energy project gone wrong is fracturing the city's picturesque architecture.

Wander among free-roaming storks at the sanctuary that helped save them from local extinction.

Stuffed people arranged in unsettling scenes give a voyeuristic glimpse of life within a historic old hotel.

A horse statue that receives constant makeovers from graffiti artists and locals.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

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

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.