There's no grave for Cathal because his father refused to bring his ashes back home.
His brother keeps the urn in his flat.
http://i.imgur.com/yi0VVaI.jpg
http://i.imgur.com/TACmPrX.jpg
Echo & the Bunnymen - Crystal Days
http://www.youtube.com/watch?v=s_ZlZLITgX4