The small bright red pillar survived the 1996 Manchester bombing virtually unscathed.

This Manchester laundromat is hiding something.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

6000-year-old site covered in more than 50 megaliths.

One of the last doorless, continuously moving elevators still in use in the U.K.

Probably the smallest museum in the world, housed in a disused phone booth.

The ghosts of Britain's telecommunication past sit rusting away in a small village in England.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

Built to ward off Napoleon's army, this city-sized abandoned Russian fort is now perfect for urban exploration.

Mysterious craters may have been home to an ancient cult.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

What almost started out as a spite house became an eccentric's found object masterpiece.

An eerie, derelict amusement park in Berlin.

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

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

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

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

Started as a kitchen garden, now the second largest botanical garden in the world.

A collection of abandoned typographic signs from Berlin and beyond.

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

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

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