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

Art and a pun, all in one.

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

A wunderkammer of mysterious objects and stories.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

The most visited, and possibly most controversial, museum in Germany.

Started as a kitchen garden, now the second largest botanical garden in the world.

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

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

This historic castle is one of the oldest and most impressive in all of Japan.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

An abandoned quarry hides an open-air gallery of huge sculptures, some made from the rubble of 9/11.

An impressive bridge over a ravine also served as an aqueduct.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

This chestnut box will not be opened until the country music legend's 100th birthday in 2046.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

This delightful little museum is dedicated to only one thing: pasta.

Rome is now home to a stunning food museum and library.

The world's largest model of our planetary system.

A map of Italy made entirely of trees.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

This church carved into the rocks is full of enchanting stone statues.