[2] On the hilltops are about twenty passage tombs, some decorated with rare megalithic art, which were built in the 4th millennium BC.

Legend has it that the monuments were created when a giant hag, striding across the land, dropped her cargo of large stones from her apron.

Research on human remains found in association with similar Irish monuments suggests that the builders were descendants of people who settled in Ireland from around 4,200 BC.

In 1980, Irish-American researcher Martin Brennan discovered that Cairn T is directed to receive the beams of the rising sun on the spring and autumnal equinox, when the sunbeam shines down the passage and lights up the megalithic art on the backstone.

[4] The passage tombs likely predate those at Brú na Bóinne and much of their art anticipates similar forms used at those sites.