An exploration of the Irish Stone Age sites of Newgrange, Knowth, Dowth, Loughcrew, Hill of Tara, Fourknocks and others in the context of astronomy, art, mythology, archaeology and photography, which demonstrates how the ancient people were confidently able to predict solar and lunar events, and were aware of the great cosmic cycles such as the Metonic Cycle of the Moon and Precession of the Equinoxes.