Glyn Burial Chamber is in Benllech, Anglesey, Prehistoric Anglesey Burial Chambers.
Glyn Burial Chamber [Map]. Limestone capstone, propped in place by other stones. The rise in ground around it may represent a 14m circular mound or cairn that originally covered it. Partial excavation by E.N. Baynes in 1909 found that 'treasure seekers had cleaned out the whole of the chamber'.