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Viking-Age Ring Fortress Aggersborg

The world's largest ring fortress

Viking-Age Ring Fortresses

New danish

UNESCO World Heritage

King Harald Bluetooth's five ring fortresses Aggersborg, Borgring, Fyrkat, Nonnebakken and Trelleborg were on 17 September 2023 included in UNESCO's distinguished list of places of exceptional value for all humanity.

With the ring fortresses, there are now 11 areas on the UNESCO list for Denmark and the Commonwealth. Being designated as a World Heritage site is a blue stamp of a site's global importance and obligates to protect, preserve and spread knowledge of the site.

Download our app

Download our app and experience how the impressive fortress with its 48 long houses rises again in the landscape or take a digital guided tour by scanning the QR code on the viewing platform.

Landscape of power

Seen from the air, you get a good idea of the fortress's impressive size and, not least, its strategic location at one of the traffic hubs of the Viking Age, the Limfjord.

Guided tours and events

Book a tour, experience the Viking craftsman meeting in August or join one of our programmed tours. Find the dates on this page.