These five archaeological sites comprise a system of monumental ring-shaped Viking-Age fortresses sharing a uniform geometric design. Constructed between about 970 and 980 CE, the fortresses at ...

For the most part, the show is primarily set in Scandinavia but with so many places being part of the setting, audiences still wonder about what the map ... and the Viking settlers. Denmark ...

but it was really put on the map 800 years later when the Vikings invaded from Denmark and turned it into a major river port, servicing their trading network throughout northern Europe.