While Newgrange may be the most famous Neolithic passage tomb in Ireland, Loughcrew is one of the most fabled. Around 3300-2900 BC, rock cairns were piled high atop four hills that sit side-by-side in modern-day County Meath. These hills are known as Slieve na Calliagh, or “Mountains of the Witch.” Legend says that a giant witch hopped from hill to hill, dropping rocks from her apron as she went, thereby creating Loughcrew Cairns. On her last leap, she fell to her death and was ultimately buried in one of the…