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

The world's only above water sand volcano, believed to once be the bathtub of a priest.

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

This trio of stone spires claims to be the only preserved medieval execution site in Europe.

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

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

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

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

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

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

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

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

The internet as provided by a James Bond villain.

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