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.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Long tunnels run under the ancient chariot racing circuit to the tower.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A beer pipeline runs beneath Bruges.

A little sculpture with a large wardrobe.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

The largest flower auction house in the world.