Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

Stockholm's narrowest alley is barely over two feet wide.

This medieval castle was painted pink as part of a now-abandoned children's theme park.

This neighborhood of futuristic ball houses looks like an alien settlement in a science fiction film.

Its town washed away centuries ago, this lonely tower by the sea tells the tale of a mermaid and a curse.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

The nerve center of a massive, state-of-the art radio telescope that sprawls across Western Europe.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

Decrepit Victorian public lift is a white-knuckle ride.

The oldest working mechanical clock in the world.

The alleged birthplace of Lady Jane Grey, who was executed at age 16 for claiming the throne of England.

The oldest inn in England served brew to the crusaders.

It's forbidden to dig within this ancient Roman fort hidden beneath a playground.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

A modern reimagining of a medieval city gate.

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

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

Four giant movable street lights decorate this modern Rotterdam square.

This wonky bit of historical taxidermy is experiencing a second life online.

This charming pup is meant to celebrate the youth and stubbornness of the city's students.