I am attending the Solheim Cup outside of Dublin in September. I have 3 1/2 - 4 days after before I meet my husband in London. Overwhelmed with choices as to how spend the time. I am by myself and don't want to rent a car. I am a golfer and am tempted to golf but not sure!
You can stay in Dublin and see as much as you want. Day trip options using commercial tours include Newgrange & Knowth and Powerscourt & Glendalough. Unless you've been there before, that should keep you busy.
Ken makes some great points. With only 3.5 or 4 days, then Dublin has plenty in the area to keep you busy. If you don't want to rent a car, a tour is probably a good way to go- there are tons of options and you can hardly go wrong. Glendalough/ Wicklow, Powerscourt, Newgrange, and even Belfast are all options for you, depending on your interests. If you want more specific information, PM me.