A 13th century fortified house built to defend the Duchy of Burgundy.

The shape of this old salt factory complex was inspired by the course of the Sun.

The ruins stand as a somber reminder of France’s worst civil catastrophe of the 20th century.

Monsters and miniatures are held in equal esteem at this wondrous museum.

An eerie, derelict amusement park in Berlin.

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

Cold war icon and onetime "hole" in the iron curtain.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

A 12th-century fortress containing some of Berlin's oldest buildings.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

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

A fascinating insight into daily life in the Eastern Bloc.

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.

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

The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

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

This conical hill was built as a testing ground for an engineer known as the Glider King.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

This sprawling Jewish cemetery is one of the largest in Europe.