Visit Blarney Castle
I spent most of my time in Cork visiting Blarney Castle, and yes, I kissed the Blarney Stone. Definitely worth the trip, because the entire grounds of Blarney Castle and the castle itself were beautiful. You can easily spend the entire day walking around the grounds, climbing the castle, and enjoying the beauty that is Blarney.
Insider Tip:The stone is actually difficult to kiss, hopefully you aren't afraid of heights!