Periyar, is the best-known wildlife sanctuary in south India,Kerala. Though considered as a tiger reserve, Periyar is really famous for its wild elephants.One of its main attractions is 100-year-old artificial lake and its setting in the beautiful thickly forested Western ghats.There's plenty of other animals like the Nilgiri langoor, Nilgiri tahr, bison, deer, antelope and about 700 elephants to make the trip wonderful. The Periyar Tiger Reserve consists of tropical evergreen, semi- evergreen and moist deciduous forests. Its legal status as a National Park is still under dispute and only one notification has been issued.It was declared a Project Tiger Reserve in 1978 and the first research started in 1991.The national park and the tiger reserve is rated as one of the best wildlife sanctuaries in India for wildlife photography, bird watching, elephant herds and tiger watching.Some of the deeper valleys contain tropical evergreen forest with extremely thick tree cover that even bright sunlight finds hard to penetrate.There are, now, an estimated 40 tigers in the Periyar national Park. Periyar also happens to be the habitat of the beautiful Nilgiri Tahr, which is rarely to be seen.