The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

Puppet theater and museum holding a collection of more than 300.

Where once there was a train station bathroom, there is now this German burger joint.

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

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

An eerie, derelict amusement park in Berlin.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

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

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

A slice of central Asia in the middle of Berlin.

A surreal museum of extraordinary industrial objects.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

An artistic tribute to the famous singer, just around the corner from where he was born.

Because there's no place like home.

The taxidermied remains of a once-great parrot.

A hidden world of exotic succulents and cacti.

A small literary museum remembers the life and works of the author of The Thirty-Nine Steps.

A 200-year-old collection of oddities and medical paraphernalia.

A succession of eerily contemplative iron figures lead from a Scottish museum to the sea.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

This series of Scottish caves has no clear purpose other than baffling historians.

A sweet symbol marks the place where torturous executions were once carried out.