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

It's always game time at Stockholm's only museum devoted solely to video games.

A modern, secular take on a traditional Virgin Mary motif.

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

Stockholm's tiniest statue is of a small boy looking at the Moon.

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

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

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

The Swedish flag over this small naval fort signals that the nation is at peace.

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.

An abandoned, deteriorating tuberculosis hospital from the turn of the 20th century.

The place to be if you love vintage Swedish cars.

The charming storybook building now houses a small police museum.

This abandoned urban warfare facility is a dream come true for airsoft and paintball enthusiasts.

The art critic claiming that "only an ape could have done this" was in fact right.

"Only the dead get off at Kymlinge."

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

A floating underwater hotel, created by a Swedish artist.

Stone carvings record the Norse myth of Sigurd, providing a glimpse into Scandinavia's transition from paganism to Christianity.

One man's fascination with Turkey led to this backyard mini-city.

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

Many historians today consider Sverre as Norway's greatest king of all time. 

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

An abandoned Byzantine fortress and notorious prison.