Pothundi Dam.

Pothundi Dam is an irrigation dam near Pothundi village in the Palakkad district of Kerala state, India. Constructed in the 19th century, it is considered one of the oldest dams in India. It provides irrigation to an area of 5,470 hectares in the Palakkad district and drinking water supply to the Nemmara, Ayalur, Melarcode Panchayat. An unusual feature of the earth dam is the core wall, which is b... (Wikipedia)