This multiple stone circle seems to have consisted of 11 original stones - six are still standing, some at odd angles and the remainder are toppled and in the centre is a slab-like stone. A signed path allows access to the circle. The stone row at Coolcoulaghta 400 metres away appears to be aligned to this circle - roadside parking is available by the stones on the L8451.
External Links:
https://roaringwaterjournal.com/tag/dunbeacon-stone-circle/