mega-what / prehistoric horizon calendars / Ireland, Co. Clare, Ballyvaghan

Poulnabrone Portal Tomb: 360° S centred

South centred panoramic view with luni-solar trajectories c.3800BCE from Poulnabrone Portal Tomb, Clare, Ireland. South is at the left end of a rise, the right side of a dip. North is marked by a step at the left end of a ridge, the right side of a dip.
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© Michael Wilson.