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

A spherical "micro-nation" in the heart of Vienna.

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

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Baroque celebration of the end of the Great Plague of Vienna.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

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

Cold war icon and onetime "hole" in the iron curtain.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The celebrated eyesore created by starry-eyed sweethearts.

This bridge was constructed from the rubble of the infamous Bastille.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

This disused Cold War bunker has been restored to all of its early 60s glory.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

Three bridges straddle a stream, one stacked upon the other.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.