The Castle Ring defended settlement (immediately north of Harthill Moor Farm) now consists of an oval earthwork ditch (about 5m wide and 100m across) with inner and outer banks, up to 2m high. It hasn't been excavated but it is considered to be an integral part of the Bronze Age landscape of Harthill Moor. Harthill Moor bowl barrow is a Bronze Age burial mound about 150m SE of Harthill Moor Farm. It is 20m long and 11m wide. It was partially excavated in 1877 by Jewitt and Greenwell. A limestone cist was found with the remains from two cremations.