In Chennai, Pithru Tharpanam (the ritual of offering oblations to ancestors) is traditionally performed at sacred water bodies, specifically sea shores and temple tanks. Devotees often gather at these locations during auspicious times like (New Moon), particularly Thai Amavasai Aadi Amavasai , to pay homage to their forefathers. Top Places for Pithru Tharpanam in Chennai Mylapore - Google Arts & Culture