Francis Pryor has been researching the Fens of Eastern England since 1970. During this work he has revealed and excavated a number of preserved prehistoric landscapes including a large tract of land immediately east of Peterborough. This landscape was known as Fengate, or 'road to the fen' by the Vikings and it has produced some of the finest preserved prehistoric sites in Europe, including Flag Fen, which was first discovered by Pryor and his team in 1982.