mega-what / prehistoric horizon calendars / Ireland, Tipperary

Shrough Passage Tomb: 360° N centred

North centred panoramic view with luni-solar trajectories c.3000BCE from Shrough Passage Tomb, Tipperary, Ireland. North seems to be indicated by a small hilltop in the dip between a pair of larger hills. South is roughly indicated by the last dip in the mountain chain.
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© Michael Wilson.