Punnamada Lake (also called Punnamada Kayal) is a part of the Vembanad Lake, which is the biggest lake in Kerala. Vembanad Lake spans to a number of districts in Kerala. Hence, it is called by different names at different parts of Kerala. When the lake reaches Kuttanad, it is called Punnamada Lake or Punnamada Kayal. The Port of Kochi is located around two islands the Willingdon Island and Vallarpadam which lie in this lake. The lake is called Kochi Lake in this part of Kerala. The famous Annual Nehru Trophy Race of Kerala is also conducted on parts of Punnamada Lake. The Kochi Lake is a portion of the Vembanad Lake, which is located in and around the Kochi Mainland. Kochi Lake forms home for several groups of small islands, which include Vypin, Mulavukad, Vallarpadam and Willingdon Island. Kochi Lake is home for the Kochi Port, which has been built around the Willingdon Island, as well as the Vallarpadam Island.