An otherworldly, fossil-rich cobble beach holds Viking graves, cairns, and other remains.

The world's biggest version of the popular Swedish souvenir.

Unfortunately, you can no longer spend a night in this single-person treetop hotel.

A floating underwater hotel, created by a Swedish artist.

This 2,000-year-old stone maze is one of the oldest in the country, but its purpose is still a mystery.

This patch of land is home to Sweden's largest burial mound, allegedly belonging to a mythical king.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

This fantastic cave remained unexplored until 1948 when three schoolboys discovered a hidden entrance.

The world's largest underground iron ore mine.

This tiny Swedish troll protects the land and all who wander within it.

Gravity seems to fail at this intriguing Swedish attraction.

A sharp sculpture made of thousands of pieces of jagged glass.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Six beautiful wooden giants are hidden around Copenhagen.

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

Few would expect the world's oldest preserved oil refinery to be found in Sweden.

A museum dedicated to the history of psychiatric treatment featuring a gallery of art made by patients.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Visit the home of Sweden's beloved fictional character, Pippi Longstocking.

Stockholm's narrowest alley is barely over two feet wide.

A heated statue pays tribute to one of Sweden's great actresses.

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