This museum of Viking vessels allows visitors to take a replica out for a spin.

This wonky bit of historical taxidermy is experiencing a second life online.

This poured-concrete water reservoir is a gem of modernist architecture well-hidden in a city forest.

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

The 19th-century home of Count and Countess von Hallwyl is now a museum.

This legendary dessert was served to Nobel laureates for decades.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

A collection of trees from various corners of the world call Stockholm University home.

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

These Bronze Age rock carvings are among the oldest in the region.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

The center of Stockholm can be found along this quiet street.

The suspected burial mound of legendary Viking Björn Ironside.

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

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

Legend has it this spring formed at the spot where a medieval Swedish king was killed.

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

The second-largest collection of runic calendar staffs in Sweden.

This mysterious runestone embedded in a church wall is linked to the medieval cult of Saint Erik.

A small church in Uppsala hides the grave of a renowned 18th-century astronomer.

The world's biggest version of the popular Swedish souvenir.

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

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.