The Vikings are synonymous with Danish ancient history. The National Museum of Denmark houses a few fascinating Viking artifacts. Some of their treasures, ships, weapons and victims are surprisingly well preserved because they tossed everything into peat bogs. The naturally mummified bog bodies are grotesque because of the detail of the corpses dating as early as 1400 BC. Unfortunately there are no photographs available of the bog bodies on display in the National Museum.
Read an interesting article about Danish bog bodies in Discover Magazine.