aerial view of ross castle, 15th-century tower house and keep on the edge of lough leane, in killarney national park, ireland

architecture 15thcentury destination attraction historical killarney landscape national muckross historic landmark fortress medieval building outdoors monument ireland ancient tourism history tourist defense vibrant flyover aerial castle county travel nature europe scenic tower house lough leane kerry stone irish green view ross edge park lake boat ruin fort wall rock old sky