Discover Denmark's Viking Age Ring-Shaped Fortresses

Discover the five ring-shaped Viking fortresses that were built during the early Middle Ages in Denmark as either trading posts or military bases.

Incredible Viking Fortresses in Pictures

Borgring Fortress Discovery: Dendrochronological Dating Results

In the Footsteps of the Vikings: East Denmark

Historians Find Viking Ring Fortress in Denmark

New Viking Ring Fortress Discovered - Medieval Histories

Danish Viking settlement to be restored as a tourist attraction - Lonely Planet

5 Danish ring fortresses were recently named world heritage by UNESCO

Viking-Age Aggersborg - Medieval Histories

Denmark's Viking Ring Fortresses Will Be Europe's Next Big Attraction

Danish Viking Age Ring Fortresses Declared UNESCO World Heritage Sites