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

The monumental home of Prussia’s eccentric "Cannon King."

This former steel and coal plant is now a neon-lit industrial fantasia.

This monolithic slab of art metal crowns a German slag heap.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

A beautiful lighthouse with as many steps as days in the year, as many windows as weeks, and as many levels as months.

The smallest port in France is named after the pirate who created it.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The haunting concrete remains of a Nazi pebble crusher can still be found in this small French commune.