The Neyyar river flows from the Agastyamala hills (Agastyarkoodam) in Thiruvananthapuram district of Kerala State. It has a total length of 56 km. Its tributaries includes the Kallar (river), Mullayar river, and the Karavaliyar river.
Sasthamkotta Lake is the largest fresh water lake in Kerala.
The Maramon Convention, one of the largest Christian convention in Asia, is held at Maramon, Pathanamthitta, Kerala, India annually in February on the vast sand-bed of the Pampa River next to the Kozhencherry Bridge.
Silent Valley was declared as a National Park in the year of 1984.
Mangalavanam bird sanctury is known as the green lungs of Kochi.
About 50% to 60% of the rain received by the state of Tamil Nadu is from the Northeast Monsoon.