Ashtamudi Lake (Ashtamudi Kayal) is a freshwater lake in the Kollam District of Kerala, India. Ashtamudi means 'eight branches' (Ashta = 'eight'; mudi = 'branch') in the local language of Malayalam. This name is indicative of the lake's topography: a lake with multiple branches. Ashtamudi Lake is currently registered as a wetland of international importance under the Ramsar Convention.

Rail accident
The Island Express train suffered a major accident while crossing a bridge at Perumon on July 8, 1988. A large number of its coaches fell into the lake. Scores lost their lives. The train's operator was later declared unfit for his duties.[citation needed] As part of line broadening later, Indian Railways constructed a new bridge across the lake. The old bridge remains in memoriam of the tragedy.

Paravur Kayal is a lake in Paravur, Kerala, India. Although it is small, with an area of only 6.62 km², it is the end point of the Ithikkara River and part of the system of lakes and canals that make up the Kerala Backwaters. It has been connected to Edava Kayal and Ashtamudi Kayal as part of the Trivandrum - Shoranur canal system since the late 19th century.

Punnamada Lake is a lake in the "backwaters" region near Alappuzha in the Indian state of Kerala. The lake hosts the annual Nehru Trophy Boat Race, which is held every August, is a popular Vallam Kali.