Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

One of downtown Berlin's last reminders of its Communist past.

A restaurant and observation deck built in a unique broadcasting antenna.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Ruins of a German castle on top of a towering stone pillar.

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

Sturdy scales are a surprising thing to find in a modern European city.

A monument dedicated to a lone, brave invader.

These two 15th-century metal rods allowed people to check if they were swindled or not.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

A set of outdoor stairs named in honor of a famous Austrian artist.

The world's oldest known salt mine.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

Legends surround an ancient tree trunk riddled with nails for good luck.

These relics of the city's past now exist as a prominent modern feature.

This strange statue features a bust of the famous composer plopped atop a woman's body.

A museum capturing one of the world's most famous classical composer's battle with hearing loss.

This splendid tomb may look fantastic, but there's nothing in it...

Designed as a reminder of one of the darkest moments in Austrian history.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.