Vembanad Lake
Vembanad (Vembanad Kayal or Vembanad Kol) is the longest lake in India, and the largest lake in the state of Kerala. It is also counted as one of the largest lakes in India.
The Nehru Trophy Boat Race is conducted in a portion of the lake. High levels of pollution have been noticed at certain hotspots of the Vembanad backwaters. Government of India has identified the Vembanad wetland under National Wetlands Conservation Programme.