An oxbow lake forms when a river creates a meander, due to the river's eroding the bank through hydraulic action, abrasion and erosion. After a long period of time, the meander becomes much curved, and eventually the neck of the meander becomes narrower and the river cuts through the neck during a flood, cutting off the meander and forming a free standing oxbow lake, which resembles the bow pin of an oxbow. The oxbow lake at Vynthala is found in the middle course of the Chalakkudi River and is the only one of its kind in South India. Presently, the lake has become silted and is overgrown by bushes that need conservation.


  • Located at Vynthala near Sampaloor, 13 km from Chalakkudi
  • Located 42 km from Thrissur