Carrowkeel is a Neolithic passage tomb cemetery in the south of County Sligo, near Boyle, County Roscommon. Tombs are dated for a period between 3400 and 3100 BC. So that they predate the Pyramids on Egypt's Giza plateau by 500–800 years. Carrowkeel is one of the "big four" passage tomb cemeteries in Ireland (the other three are Brú na Bóinne, Loughcrew, and Carrowmore). - (by Wikipedia)
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