Waters' dad, Lieutenant Eric Waters, died during the 1944 battle of Anzio when his son was just a baby, and the British rock 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, 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.
Waters was overcome with emotion as he paid tribute to his father, 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 Pink Floyd's track Outside The Wall.
