Research station devoted to mysterious floating lights seen in a Norwegian valley.

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

Winter roadtrips are a little more exciting on this seasonal, slippery expansion of Sweden's national highway system.

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

Tiny Swedish village with a distinct local phenomenon known as an "Elk Shower."

A centuries-old iron mine is now a paradise for explorers, divers, and spelunkers.

A centuries-old copper mine that once provided two thirds of the world's copper supply.

A massive land art sculpture fills a green space once tarnished by a landfill.

This luxury hotel suite is located deep in the bowels of an old mine.

Bring your hiking shoes, wool socks, and thermal underwear for a stay in these cozy forest huts.

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

An eclectic sculpture park rises atop a giant pile of ashes in Sweden.

This floating sculpture of ice is a poignant reminder of nature's power.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

Thousands of miniature bronze sculptures have taken over this city square creating a unique art installation.

This Swedish automobile graveyard is a beautiful gallery of decay, but woe be to any who would steal a souvenir.

The remains of Alfred Nobel's first nitroglycerine factory can still be found on the shores of a Swedish bay.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

These two springs are tied to several legends, one of which involves the travels of Saint Olof.

Rocks carved with biblical passages in the 1800s.

A memorial to a Swedish hockey player's "encounter" with aliens.

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

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

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.