I grew up in Dublin, these are all over the place there. I particularly like the one in Loughshinny, there's a rope hanging out the (metres above the ground) doorway, and you can climb in to explore.
The floor inside has collapsed, but you can shimmy around on the ruin of an interior wall to get to a spiral staircase, which brings you up to the gun platform up top. No gun left, unfortunately :p. There is a murder hole* though.
The floor inside has collapsed, but you can shimmy around on the ruin of an interior wall to get to a spiral staircase, which brings you up to the gun platform up top. No gun left, unfortunately :p. There is a murder hole* though.
* https://en.m.wikipedia.org/wiki/Murder_hole