It houses the remains of a 17th-century version of the Titanic.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

This Danish park has celebrated the American independence day since 1912.

The last Viking king of Denmark is buried inside the crypt of this cathedral.

An exhibition of preserved locomotives housed in a 1950s depot shows the history of Denmark's railway.

This antique farmhouse is one of Læsø's rare seaweed houses.

The largest of Denmark's seven mysterious round churches stands on an island in the Baltic Sea.

Denmark's famous pseudo-hill.

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

Denmark’s never-ending bridge.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

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

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

The oldest amusement park in the world has been providing a nice spot to have some fun since the 1500s.

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.

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.

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

A natural wonder in south Denmark.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

The fairy tale castle of the "fairy-tale king."

Ancient man-made caves underneath small town Belgium.