Nearly 40 miles and 1,000 years of limestone mines under Denmark.

A perfectly circular stronghold constructed in the 10th century is now a nucleus of Viking culture housing a museum, village, and reenactment of an epic Viking battle.

Preserved "bog person" that is over 2,000 years old.

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

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

The world's largest maze is a nature park with nearly 200 decision points.

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

A collection of noses tucked inside an art museum reveals how times have changed.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

Iron Age "bog person" preserved for over 2,300 years.

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

Hans Christian Andersen for the postmodern world.

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

Old Danish castle immortalized in Shakespeare's Hamlet.

This sublime architectural marvel is a rare example of an expressionist church.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

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

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

Six beautiful wooden giants are hidden around Copenhagen.

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

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