An old drug store full of mortars and pestles, pill-making machines, and medicines reputed to cure most any illness.

The world's first and only museum dedicated to dachshunds.

Two stunning 17th-century libraries and a cabinet of curiosities.

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

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.