This small fort played a huge role defending Puerto Rico’s capital city.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Bridge that died in war and was resurected.

Macabre astrological automaton clock dating to the late 1400s.

This lake-bound geographical marker sits at the point where three European countries intersect.

The world's first ice hotel is still one of the most elaborate and beautiful.

This abandoned Swedish folkpark offers an amazing view over the town of Överkalix.

The remnants of a record-setting industrial bucket system can still be found dotting the Swedish countryside.

Swedish skyscraper with a 90° twist.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Rotterdammers' dirty minds gave this santa a dirty nickname and cursed it to a life of wandering.

Single runway interrupted by a busy road that cuts across its middle.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

An ethereal glowing blue ocean cave in Croatia.

The original film set of Luke Skywalker's Tatooine home from the 'Star Wars' trilogy.

Buildings from the fictional planet of Tatooine still litter the Tunisian desert.

Made famous by 'Star Wars,' these troglodyte homes face an uncertain future.

A 15th-century granary that played the role of futuristic slave quarters in the world of 'Star Wars.'

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Come for the flowers, stay for the bats!

Think you have a tough job? Try carrying 200 kilos through a cloud of sulfur down the side of a volcano.