Open to visitorsa Cadw site, free to enter — check opening times before you go
Standing remainssubstantial fabric survives to stand in front of
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Tŷ Mawr Standing Stone is a prehistoric standing stone in Anglesey. The Albion Guide lists three standing stones in the county; this is one of them. The site is in the care of Cadw. Its Welsh name is Maen Hir Tŷ Mawr.
Holyhead Station is 1.4 km away to the north-west. Other standing stones nearby include Penrhosfeilw Standing Stones and Tregwehelydd Standing Stone.