One of the many castles in Ireland, I saw this on my tour from Galway to the Cliffs of Moher. You can actually go inside the courtyard as well, I love stuff like that. I even took a rock home with me, kind of a cool souvenir.
Not far from Dunguaire castle is a really cool cave you can go in and explore. Ireland is filled with so many beautiful sites, and this entire can be considered one!