Between AD43 and 410, during the Roman occupation of Britain, native farmers built two settlements on a slope overlooking the valley of the Kielder Burn. One settlement is an oval-shaped enclosure surrounded by a stone and turf bank. It contains the remains of at least eight stone round houses. The other settlement is terraced into the hillside. It is bounded on the open side by a stone and turf bank, and contains the remains of at least six stone round houses. Archaeologists think the two settlements were lived in at different times. The settlements have been given the name Bran's Walls. Bran's Walls is a Scheduled Monument protected by law.