This castle ruin in the middle of nowhere is a gem for wildlife enthusiasts.

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

The suspected burial mound of legendary Viking Björn Ironside.

Iron Age grave stones and Viking burials, a short drive from Gothenburg.

Walking through this narrow gorge will make you feel like you've fallen into a fairytale landscape.

The single richest source of elemental discoveries in the world.

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

A Japanese video game arcade hides in the back of a Swedish pool hall.

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

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

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

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

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

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

This Stockholm light tower can be controlled by anyone with a smartphone.

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

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

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

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

This stunning concert hall has become a symbol of Iceland's national recovery.

The largest whale museum in Europe allows visitors to walk among life-size giants.

The Icelandic Sea Monster Museum explores the area's history of aquatic cryptid sightings.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

An encyclopedic collection of mammal penises.