Aggersborg - Credit: Wikimedia Commons
Aggersborg - Credit: Wikimedia Commons
Aggersborg is the largest of Denmark's former Viking ring fortress, and one of the largest archaeological sites in Denmark. It is located near Aggersund on the north side of the Limfjord. It consists of a circular rampart surrounded by a ditch. Four main roads arranged in a cross connects the fortress center with the rampart's outer ring. The roads were tunneled under the outer rampart, leaving the circular structure intact. Read more on Wikipedia
Source: en.wikipedia.org