Part of Ireland’s national university, with about 7,000 students, this center of learning is housed in a pretty quadrangle of Gothic Revival–style buildings. Colorful gardens and wooded grounds grace the campus. An audio tour of the campus takes in the Crawford Observatory, the Harry Clarke stained-glass windows in Honan Chapel, the landscaped President’s Garden, and the Stone Corridor, a collection of stones inscribed with the ancient Irish ogham written language. You can also join an hour-long guided tour, given by students, leaving from the visitor center at 3pm from Monday to Friday, or noon on Saturdays. Also on the campus, the innovative Lewis Glucksman Gallery (www.glucksman.org; 021/490-1844) has an excellent program of exhibitions. Expect to see cutting-edge photography, painting, sculpture, and a few items from the university’s ever-expanding permanent collection. A good cafe and shop are also on site. Admission to the Glucksman is free, though a donation of €5 per person is requested.