Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

The first thermometer made with the almost-universal temperature scale is backwards.

A former top secret military tunnel is now stuffed with snow and open year-round to skiers.

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

Ancient stone graves shaped like ships provided a Viking-like burial to carry the dead to the afterlife.

A catapult rock from Gotland’s 13th-century civil war is still lodged in Scandinavia's best-preserved medieval city wall.

It was meant to help transport wounded soldiers to a secret underground hospital.

The world's biggest floating museum in Gothenburg, Sweden.

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

Sweden's oldest animated sign is still lighting up the skyline today.

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

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

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

Said to be one of Sweden's most haunted places, this vicarage once even attracted a ghost-busting priest.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.

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

Sweden's "good old days" painstakingly re-created in a model village.

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

The world's first ice hotel is still one of the most elaborate and beautiful.

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

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

This roadside attraction looks like a flying saucer parked atop the tundra.

The world's northernmost brewery uses water from a 2,000-year-old glacier to create its beer.