Archaeological evidence from sites in and around Cardiff: the St Lythans burial chamber near Wenvoe, (approximately to the west of Cardiff city centre); the Tinkinswood burial chamber, near St. Nicholas (about west of Cardiff city centre), the Cae'rarfau Chambered Tomb, Creigiau (about northwest of Cardiff city centre) and the Gwern y Cleppa Long Barrow, near Coedkernew, Newport (about northeast of Cardiff city centre), all show that people had settled in the area by at least around 6000 BC, during the early Neolithic; about 1,500 years before either Stonehenge or the Great Pyramid of Giza was completed. A group of five Bronze Age tumuli is at the summit of the Garth (), within the county's northern boundary. Four Iron Age hill fort and enclosure sites have been identified within Cardiff's present-day county boundaries, including Caerau Hillfort, an enclosed area of .