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

This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

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

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

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

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.

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

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

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

Six beautiful wooden giants are hidden around Copenhagen.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

One of the largest burial mounds in the Netherlands and Belgium.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

A true Valhalla for cactus and succulent lovers.

The tallest waterfall in the Netherlands is a lovely, stepped feature that is only 50 feet tall.

Its town washed away centuries ago, this lonely tower by the sea tells the tale of a mermaid and a curse.

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

Incredible labyrinth of man made caves.

A monument hidden in the woods built in 1938 as a getaway for a Dutch museum curator.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

A grassy pyramid named after a French battle.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.