Furhter along on the N3 is Kells Monastic site, which includes a Round Tower, numerous High Crosses andSt Columb's House -- a stone oratory, parts of which dates from the 9th Century. http://xeowulf.home.mindspring.com/Kells.html
Do you have recommendations for a stop while driving from Dublin to County Meath? We'll be staying at Ross Castle in County Meath for a few days and taking day trips to Newgrange/Hillof Tara, Trim Castle, Galway, and Belfast. However, we would love to make a stop during our drive from Dublin to the castle, but are not sure where to go (if anywhere). Do you have any recommendations?