The summit of Fawdon Hill contains the remains of an Iron Age hillfort, also known as a defended settlement. The hillfort was defended by a ditch and a rampart, which can be seen today as earthworks. A circular bank of earth is all that remains of a wooden round house inside the hillfort. Outside the hillfort, cord rig cultivation marks the areas farmed by the Iron Age people who lived inside the hillfort. This is a Scheduled Monument protected by law.