Duddo Five Stones (grid reference NT930437) is a stone circle north of Duddo in North Northumberland, approximately 4miles (6km) South of the Scottish Border. The stones were known as the Four Stones until 1903, when the fifth stone was re-erected to improve the skyline. There were originally seven stones, the empty sockets of two stones being found on the western side during excavation in the 1890s The stones themselves are a soft sandstone and have become deeply fissured by natural weathering since erection in the Early Bronze Age approximately 4000 years ago