Lindholm Høje is an Iron Age and Viking Age burial site in Denmark. It contains over 700 graves. The graves are arranged chronologically. The oldest graves from the Iron Age around 400 AD are at the top of the hill. Further down are the younger the graves. 

The graves are shaped differently depending on whether it contains a man or a woman. The graves containing men are shaped pointy like viking ships or as a triangle, while women’s graves are round or oval. The Iron Age graves was covered with a mound, and the Viking Age grave was a cremation grave. The stones surrounded the area with inside which the deceased was cremated. (Source)