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

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

When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

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

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

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

Take a schvitz just like an infamous Soviet dictator while his unblinking eye looks on.

Located in an old church, this brewery produces a different kind of holy water.

Archaeologists are still unraveling the secrets of the brutal massacre that wiped out this ancient fort.

This small town's local tradition is to create the world's tallest ice pillar.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

Every Tuesday, students let off steam by screaming into the night air.

From under the bed of one of the co-founders, this server helped launch the notorious file-sharing website.

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

This statue, deep in a Swedish forest, is all alone, just like the renowned recluse would have wanted.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

A botched 18th-century canal silenced one of Sweden's most magnificent waterfalls.

A forest of immensely tall and unusually straight oak trees planted nearly 200 years ago to build naval ships that never came to be.

Uppsala's adorable feline sign celebrates a popular children's book set in the Swedish city.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

For a couple of months each year this Swedish city turns into a festive neon phantasmagoria.