The ‘nalla thanni kulam' (good or pure drinking water pond) is an ancient water body in Venkatamangalam Village Panchayat of Kattankulathur Panchayat Union in Kancheepuram District. Long time residents of this village recalled that the tank was the only source of drinking water for residents.

“Even during the time of the zamindari system a few decades ago, the water from the pond was the source for the zamin family,” said Vembuli Mariappan, in his late sixties.