Cruiseship sails behind Poolbeg lighthouse entering into Dublin port for holiday

cruiseship sails poolbeg lighthouse entering dublin port holiday poolbeg lighthouse great south wall south bull wall port of dublin aerial drone ringsend poolbeg peninsula dublin bay sea wall bull wall equidistant sea cliff red historic structure octagonal stone staircase dublin port company comissioners of irish lights standard entrance harbor ireland architecture tourism nature landmark beacon nautical navigation light safety maritime marine