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Photo: Frank Vincentz, CC BY-SA 3.0 via Wikimedia Commons
The remains of an ancient Viking settlement, which is now considered the most important archaeological site of Schleswig-Holstein. There is a museum and reconstructed houses where you can learn about the history of Hedeby and the everyday life of the Vikings.
The Hedeby Viking Museum is a museum near the site of Hedeby, a former medieval city in Schleswig-Holstein, Germany focusing on the Viking Age history of the region. While the region is now in modern Germany, it was once the oldest city in Denmark until it was ceded in 1864. The museum, located in the Busdorf municipality, features reconstructions of various Viking Age dwellings and ships and houses numerous artifacts discovered during the ongoing archaeological research of the area.
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St. Peter
Houses two museums these days.
Literally meaning the Earthworks of the Danes, the first of these walls were constructed already around 500 AD as a protective wall against the south. A few centuries later, it was expanded by the Vikings into a system of trenches and walls. Interestingly, the Danevirke was used in the war against Prussia in 1864 when the Danes lost the area.