Quote by Daffysparks
I think that the claim to fame is that hook is the oldest continually operating lighthouse in the world. If memory serves me the Tower of Hercules was rebuilt and re-commissioned as a lighthouse but has not been in continuous use
According to Wikipedia. the Hook is listed as
It is one of the oldest lighthouses in the world and the second oldest operating lighthouse in the world, after the Tower of Hercules in Spain. It is operated by the Commissioners of Irish Lights, the Irish Lighthouse Authority, it marks the eastern entrance to Waterford Harbour.
So still to be proved.