This artificial ring island was built to hold cubic tons of polluted dirt.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

A nearly 25-foot concrete sculpture of Sylvette, Picasso's muse.

This gigantic monument hidden in the woods was built to thank the Dutch for sheltering Belgian refugees during World War I.

A strangely curved lamppost stands tall over this avenue in Rotterdam.

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

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

In the Netherlands, one of the world's largest private car collections can be found.

This giant wire frame man sculpture is crouched in contemplation.

This colorfully-painted tunnel links two distinct parts of a historic neighborhood.

The Rozenberg wind wall in South Holland makes for smooth sailing through the Calandbrug canal.

Made of 41,900 pieces of mosaic, it took two years to piece together this giant egg.

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

An ingenious Dutch land art project uses grass ridges to cut airport noise pollution in half.

A giant floating rubber duck-bunny painted with a different design every year.

This former hydraulic laboratory is now a woodland dotted with old engineering models.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

Science meets wall art to highlight the beauty of famous mathematical equations.

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

Remarkably preserved body discovered in a peat bog.

The world's first floating farm is staffed by one human, three robots, and 35 cows.

The place where houses are born.