This Denmark theme park is part family attraction, part experimental archaeology project.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

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

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

A natural wonder in south Denmark.

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

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

A walkable map of the world, made from soil and stone by one man.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

This unusually shaped mountaintop tower looks like a UFO floating over the city.

This doorless 20th-century elevator doesn't stop or slow down.

This former quarry is now a picturesque gorge that hides a sunken lake.

Looming communist pillar with a Czech twist.

A spiral staircase twists to the top of this unusual Czech lookout tower.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

Bohemian paradise covered in majestic forests.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Macabre astrological automaton clock dating to the late 1400s.

This Croatian computer club features such gaming relics as the infamous Virtual Boy and an 8-bit Pacman machine.