Ognian V.
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That's a must go to place, if you're really into Icelandic history. Quite interesting as you get to enter some real and well preserved turf dwellings. There are rooms for everything, from food storage, to repair shops, knitting places, baby rooms, animal housing, you name it. A whole life organized into these well-isolated houses where people lived in the ages where no wood or hard stone was available in this land of fire and ice.