Take the Navan Road out of Dublin and head northwest for Tara, the site of a former royal acropolis in an area that is rich in ancient monuments. Continue north to Navan and Slane, and visit the Bronze Age cemeteries of Bru na Boinne, Kings William Glen, Melifont Abbey and Monasterboice. Drive through Drogheda to Dunleer and Dundalk, where you can explore the surrounding countryside. Head further north and drive a loop along the rugged Carlingford Peninsular around Omeath, Carlingford and Ballymascanlon, and back down to Dundalk.
Head back south, through Castlebellingham, Clogher and Baltray, with a great beach and golf course, and on to Drogheda on the River Boyne. Follow the coast road and enjoy a pleasant drive through Balbriggan, Skerries, Rush, Lusk, and detour to Newbridge House in Donabate. Stop by at Howthe and take in the magnificent views from the rocky Hill of Howthe. Drive back to Dublin via Sutton.
Head south from Dublin toward the Wicklow Mountains, and stop at the pretty village of Enniskerry. See the highest waterfall in Ireland at the Powerscourt Estate and Gardens. Drive through the Sally Gap towards Glendalough, one of the most picturesque valleys in county Wicklow, then through Rathdrum and Avoca towards the resort town of Arklow. From here, head north towards the town of Wicklow where you can enjoy great views of the bay, then stop by at Mount Usher Gardens near Ashford just north of Wicklow. Drive on to Greystones and Bray and through the rugged Devils Glen and the Great Sugar Loaf Mountain. On your return into Dublin, drive through Kilkee and Dalkey to enjoy the views of Dublin Bay and the city beyond.