Possibly the oldest surviving area of interest is Gun's Lane, which is named after a family who once lived in the lane. Today this is just a bridleway but it was for centuries the Cambridge to Ely causeway, which was the main road into the Fens and the Isle of Ely. The Iron Age ringfort that once stood at Arbury may well at one time have guarded one end of this road. During the Norman conquest of England, William the Conqueror passed this way with his army as he chased a rebel Saxon, Hereward the Wake, into the Fens.