Iron Age/Roman settlement in Comberton, Cambridgeshire. The dry summer of 2015 proved an exciting year for cropmark discoveries on the Cambridgeshire claylands. The cropmarks are caused by buried archaeological remains which hold more moisture than the surrounding undisturbed soil. They helped experts to see and appreciate the true extent and complexity of this Iron Age/Roman settlement in Comberton. The cropmarks show tracks leading to ditched enclosures, some with round houses. Double ditched trackways can be seen approaching some of the enclosures.