This monumental work of art symbolizes the coming together of a previously divided city.

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

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

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

A monument to the man who almost killed Hitler.

Anyone wanting to know what a dwarven mine sounds like need only visit the tunnels of this New Zealand artillery compound.

A strange machine made to evaluate the world economy using water and lots of tubes.

The mountaintop inspiration for Umberto Eco's "The Name of the Rose."

Said to be one of Sweden's most haunted places, this vicarage once even attracted a ghost-busting priest.

It was meant to help transport wounded soldiers to a secret underground hospital.

In the waters outside Helsinki, a tiny island once used as a military outpost now welcomes visitors.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Meet the oldest inhabitants of this Italian hamlet, a series of oddly preserved mummies.

The heads of two giant mythological water horses honor Scotland's horselord past.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

A book bound in the skin of an infamous criminal, along with countless other specimens.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

A 18th century graveyard and its astonishing cortege of macabre iconography.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

The front of this 17th-century cottage also contains a large, stone face.