This encrypted monolith protected a secret of Norse mythology by hiding in a church wall for over a millennium.

Street artists transformed this abandoned industrial neighborhood into one of Europe's largest graffiti exhibitions.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

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

Crooked windswept pines give this old forest an enchanted and magical look.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

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

Micro-nation based around a nine-story high illegally built tower.

Stockholm's deepest subway station is also a stunning ecological wonder.

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

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

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

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The internet as provided by a James Bond villain.