Tucked away by the Kings River in the green County Kilkenny countryside, near the village of Kells (not the one with the famous Book, that's in Meath!), the big, atmospheric ruins of Kells Priory are a strong reminder of Ireland's amazing medieval past. It's not just a pile of old stones; it's got this deep, mysterious charm, where old hints of belief, fights, and everyday monk life mix with how…