When the rain falls, this drain system turns into a musical instrument.

An intricate and amazing house built by architect Karl Junker.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

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

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

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

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

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

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

A collection of abandoned typographic signs from Berlin and beyond.

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

London's old-school healing garden.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

A cluttered and astounding collection of antiquities and curiosities.

Surreal riveted sea forts once protected the Kent shores from German attack.

A unique waterfall that some believe attracts the fairfolk.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Ruins of a German Castle on top of a towering stone pillar.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

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

This 1920s Dutch barge is now a floating bookstore.