Ancient burial grounds of the wealthy.

18th century opera in its original splendor.

This trio of stone spires claims to be the only preserved medieval execution site in Europe.

Iron Age grave stones and Viking burials, a short drive from Gothenburg.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

This encrypted monolith protected a secret of Norse mythology by hiding in a church wall for over a millennium.

This chimerical bridge/tunnel appears to dead end right into the sea.

The world's oldest individual clonal tree looks like a wimp despite standing tall for 9,550 years.

The library's graceful rotunda is like a bibliophile's temple.

Micro-nation based around a nine-story high illegally built tower.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

A public display of random paleontology.

Dozens of musicians have planted trees in this Danish park, and donated songs to go with them.

From buck blood to Theriak miracle tonic, this collection of Renaissance chemist's gear look's like a wizard's pantry.

In legend, this ancient dolmen was said to have been created when a troll tried to destroy a church.

A failed attempt to control drifting sands yielded a gnarled sylvan wonderland.

Nordic giants resurrected from the sea and restored to their former greatness.

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

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.

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

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

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