By alfjon @ 2007-12-18 11:36:19
Fyrkat might be the oldest of Denmark's former Viking ring castles. It is located near the town of Hobro some distance from the end of the Mariager Fjord in North Jutland. It is built on a narrow piece of land with a river on one side and swampy area on the others. It could have controlled the traffic on the main land route between Alborg and Aarhus.