This mound is approximate 300 feet long, and is thought to have been built around 3500 BC. The burial chambers at its end and the bones contained therein apparently saw ceremonial use for about a thousand years before the tomb was sealed up.

view from atop the barrow, over the entrance
sarcen boulders obscuring the entrance area (added around 1600 BC)
entrance to the outer burial chambers
Me inside the deepest excavated burial chamber

Close to the Barrow is another mysterious mound, Silbury Hill. This 'hill' is a flat-topped conical mound approximately 130 feet high and believed to have been built starting around 2660 BC. Excavation of Silbury Hill has revealed nothing about its purpose - it contains no burial remains or other clues.