A 30-acre garden inspired by the principles of modern physics.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Amsterdam's Red Light District leaves little to the imagination.

Every winter, this former planetarium is transformed into a massive, brightly-lit Christmas ornament.

A massive stone fox oversees a Rotterdam elementary school crosswalk.

This unique sculpture proved invaluable when it saved a train from careening off the tracks.

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

One of the largest burial mounds in the Netherlands and Belgium.

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

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

People have been placing babies on these lilies for photoshoots since the Victorian era.

A rare double mill nestled along the banks of the Aa river.

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

The 20-mile causeway that separates the Netherlands from the sea.

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

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

Hop aboard a charming bog train to explore this rare open-air museum of peat.

This massive collection of taxidermy is full of specimens collected by missionaries during their international travels.

This steel frame is a skeletal mirage of a lost 16th-century stone building.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.