An enchanting natural wonder in Puerto Rico's Camuy River Park.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

This small primate research island is teeming with playing, fighting wild monkeys.

The world's brightest bioluminescent bay.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

A sweet museum focused on beets.

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

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

An old department store turned Nazi prison turned artist commune.

Puppet theater and museum holding a collection of more than 300.

A wunderkammer of mysterious objects and stories.

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

A slice of central Asia in the middle of Berlin.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

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

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

The original "capsule building" is a masterpiece of Metabolist architecture.

A magical place that lets you play in and explore the world of Studio Ghibli.