The Cliffs of Moher are on the west coast of Ireland and are the result of retreating glaciers shearing off the rock as the ice age 
receeded. They are pretty dramatic and every tour bus in the world was visiting the cliffs when we were. It was incredibly windy; we saw several people blown to their knees. We actually needed each other for balast. Gratefully, the new and improved visitor center has put in railings, stairs and other protective measures so tourists won’t do something stupid.
I went to a couple sites, and I don’t think I would be able to look down….I think I would have opted to view it from the ocean!