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

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.

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

This German bone house contains the remains of some 20,000 souls.

An elevator into the Baltic Sea.

No need to strap in for a "ride" on this walkable roller coaster.

A small but immensely extravagant palace built by the "Night King."

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

Residents of Berlin take their coffee and cake in one of the city’s most restful spaces: a cemetery.

"The most colorful grottoes of the world.

This "floating railway" is one of the world's oldest monorail systems.

A striking 12th-century-style castle built on the edge of a cliff.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

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

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

The fairy tale castle of the "fairy-tale king."

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

The 3.8 billion-year-old rock proves that tectonic plates may have been shifting longer than we thought.

A public center dedicated to showcasing and conserving the enormous shaggy Poitou donkey.

Every half hour, the flow of this unusual spring cycles between a rush of water and barely a trickle.

At this unique farm, you can interact with adorable donkeys and view an ancient dolmen.

A gothic church dedicated to the love of wine.

A sandstone block marks the alleged spot where the legendary writer was conceived.

The woman who helped save 15th-century France was born in this humble home.