The HoHo bus is a great way to get an overview of the city, but be sure to get one with live narration. We did the brewery, not a beer fan, interesting but very crowded, especially the observation floor atop the brewery. Trying to get back on the HoHo after the tour was impossible - landed up hailing a cab. We enjoyed the Book of Kells and wandering the university area, as well as Trinity. During one of our trips to Dublin, we caught a brief downpour and wandered into a small museum on Kildare St., very interesting Celtic history. We've walked along the river, stopped at a few pubs, and dined at various restaurants. Temple Bar district hs unique shops.
Darcy