This site is unique in that it is a natural feature. I have included it here because of its mythic associations. his one is a little tricky to find. When you get the car park at the visitors centre in Co. Limerick, follow the path the goes along the shore passed Bolin Island and the dovecote until you get to the gate marked ‘no entry’. From here look into the hedge on your left and you will see a gap in the hedge and a path that goes up hill. It’s up there.

It is said that this cave is the entrance to the Celtic underworld Tir na nOg. Getting to this site is difficult which is unusual because it is very close to the pathway that runs by the shore. It’s a steep climb up to the cave and it is very slippy, particularly after a rainfall and I nearly broke my knees heading up there. The cave is not very big and only about 4m and high and 5m deep. The entrance seems to have been worked at some point and seems a little square to be natural. Getting down is much harder that getting up there. The hike is considered difficult to risky.