This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Former headquarters of the KGB.

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

Berlin's old airport.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

A museum dedicated to a Cold War era sausage.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

The highest peak in mainland Spain is said to be the final resting place of a Muslim king.

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

This luxury shopping lane has been protected by its own tiny police force for over a century.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

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

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

This Dutch statue is a monument to the fictional shrew who brought doom to the city of Stavoren.

Building Men of War and Indiamen from Holland's Golden Age.

Remarkably preserved body discovered in a peat bog.

An industrial relic is now one of Europe's most staggering art spaces.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

Hear the quietest sound from across the dome.