mega-what / prehistoric horizon calendars / Ireland, Co. Sligo, Sligo

Carrowmore Tomb 4: 360° N centred

North centred panoramic view with luni-solar trajectories c.4000BCE from Carrowmore Passage Tomb 4, Sligo, Ireland. North is in a dip, near the intersect of local and distant ground. South is indicated by a distant hilltop; in front of it Tomb 51 was built later.
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© Michael Wilson.