At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

15,000 year old bison sculptures.

The deserted pirate-themed restaurant still entices explorers.

Extensive Orthodox icon collection in Andorra.

The site of the first medieval crusade that pitted Christians against Christians.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

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

Where once there was a train station bathroom, there is now this German burger joint.

A fascinating insight into daily life in the Eastern Bloc.

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

A wunderkammer of mysterious objects and stories.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

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

Sculpture of a legendary French dragon.

This ancient theater was once the home of fierce gladiatorial battles.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

Goethe's "Faust" was inspired by these rock formations known as the "Devil's Pulpit" and "Witches' Altar."

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.