Cliffs of Moher for the fearful

They have safe, paved paths, but you could just spend your time in the visitor center. You might be able to get closer than you think you can. And, if you can't, that's okay. We all have different comfort levels.

I am fearful of heights and there were several spots with sturdy stone walls to stand behind. I think there is also an elevated area you could take photos that is not right at the edge, but it's been many years since I visited so I might not be remembering correctly. Regardless, I do recall I managed to feel completely safe and not at all vertigo-y. You can walk along the cliffs without railings but I skipped that option.

My husband has a fear of heights, but there was a huge wide pathway and very solid walls near the visitors center, so I don't even think he thought to be scared/anxious/fearful. Now, my walking across the Carrick a Rede bridge in Northern Ireland, he pretty much stood at the border of the Republic of Ireland while I did it.

As long as you stay on the path, you may feel better than you expect. As I remember, in some sections, the path is not very close to an edge and where it is closer, there are stone walls between you and the edge. You might feel reassured by watching some of the youtube videos that show people walking on the path -- as opposed to the ones where they leave the path and climb out onto the rocks, which you don't need to do.

I thank you all who responded so very much. It really puts my mind at ease.

I didn't do the cliffs walk, but really enjoyed the boat ride.