The rocker's dad, Lieutenant Eric Waters, died during the 1944 battle of Anzio when his son was just a baby, and the star spent years trying to piece together his final movements.
Waters returned to the area to unveil a special memorial in honour his father on Tuesday (18Feb14), exactly 70 years after his death.
He laid a wreath of symbolic red poppies at the foot of the plinth, which is inscribed with his father's name and rank along with a Pink Floyd lyric, and Waters was overcome with emotion as he paid tribute to his long lost dad, saying, "It is 70 years to the day since my father died here and I have finally come to the end of a journey to discover what really happened to him... I feel an enormous attachment to my father today. I'm very happy to be here."
Waters also planted an olive tree in a field close to where his father fell in battle. A solider played military funeral anthem the Last Post, and Waters later borrowed his bugle to give an impromptu performance of his band's track Outside The Wall.