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

A quirky, larger than life sculpture on an old bunker pays tribute to an eccentric carnival entertainer.

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.

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

The second oldest anatomical theater is housed in a museum of curiosities.

A large collection of ancient runestones decorates this university courtyard.

The second-largest collection of runic calendar staffs in Sweden.

A rare rune stone dedicated to a woman.

This mysterious runestone embedded in a church wall is linked to the medieval cult of Saint Erik.

The official meeting point for the oddly named governing assembly of ancient Sweden.

Ancient burial grounds of the wealthy.

This handsomely carved wooden church is more than 800 years old.

Tens of thousands of tiny bottles stuffed with various items.

Home to three historic ships from the age of Vikings.

An artist's mausoleum with a haunting echo.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

At low tide, you can see the remains of a 17th-century ship just off a Stockholm island.

Celebrating the Swedish ship used in the first Arctic expedition to navigate through the Northeast Passage.

Absolutely no saxophones in the library.

A 12th-century church with a medieval fresco and an intriguing “Greek runestone.”

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.