A floating cat sanctuary on an Amsterdam canal.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Cat art as far as the eye can see.

This subterranean studio is filled with fascinating kinetic art.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

If the tunes of antique organs and musical marionettes don't intoxicate you, the draft beer certainly will.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

This public library and its impressive collection of academic books have not changed since the 17th century.

A wunderkammer of mysterious objects and stories.

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

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

A slice of central Asia in the middle of Berlin.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

A fascinating insight into daily life in the Eastern Bloc.

One of downtown Berlin's last reminders of its Communist past.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

An interactive exhibition space dedicated to the kinetic sculptures of Swiss artist Jean Tinguely.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

Constantly maintained, this organ is playing a six-century long composition by John Cage.

The medieval institution is home to the precious treasure stolen in World War II in one of the greatest art thefts of the 20th century.

A strange rock formation with numerous legends trying to explain it.