You got some good views of the cliffs but it is so much more crowded and restricted now than when I was young. There is actually a goat path which can take you down to the base of the cliff below O'Brien's tower but that is a bit risky. There are higher but less steep cliffs up near Achill island. Croaghaun is about three times higher than these cliffs. However, if you are really into sea cliffs then you should try the Faroe Islands.