Left clicked there to confirm that was Powerscourt waterfall, in Co. Wicklow - the highest waterfall in Ireland, though it's tad overrated, as it is really only a trickle, more interseting waterfalls are Glencar waterfall in Lietrim, near the Sligo border:

And the Asleigh Waterfall near Killary Harbour in Mayo, it's the famous waterfall in the film 'The Field':

Have a good sleep!!