A giant bug impaled on a 75-foot-tall needle.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

Nicolas Schöffer's massive interactive sculpture was assembled in 1961 and brought back online in 2016.

This memorial museum chronicles the apocalyptic destruction of the First World War.

A moving memorial to the fallen and missing from WWI trenches.

A Museum of Psychiatry in a still-operating mental institution.

This ghost town in Belgium will lose its street art when it ceases to exist.

A little sculpture with a large wardrobe.

Lavish royal estate punctuated with heated greenhouses.

Climb inside an iron crystal magnified 165 billion times its normal size.

A fascinating and enormous collection of natural history exhibits stained by a dark colonial legacy.

The world's tallest boat lift stands as a massive piece of industrial tourism.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

Denmark’s never-ending bridge.

These old World War II fortifications have been transformed into an unusual equine attraction.

Four alabaster giants contemplate the tides on the shore of Denmark.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.