There is a river near Malampuzha dam. Right side from the dam. It's a nice natural place where y can swim or take a bath in it. It's nereby a government building. Ask the local people abt the way to reach it. It's just 1 Km from Malampuzha dam. If u enter the water, around 50 meters from the shore is safe. Might b a little dirty, but a nice place.