The Western Ghats is one of the eight hottest biodiversity hotspots in the world and a UNESCO World Heritage Site. The mangrove forests of Pichavaram are the second largest in the world and the Gulf of Mannar Biosphere Reserve covers an area of 10,500 km2 of ocean, islands and the adjoining coastline including coral reefs, salt marshes, mangroves and is home to endangered aquatic species including dolphins, dugongs, whales and sea cucumbers. The wetlands attract numerous migratory birds from Europe and America. The state government has established 13 bird sanctuaries to protect the birds from poaching and hunting. The state also has various bird sanctuaries including 13 established bird sanctuaries The state is home to one of the largest populations of endangered Indian elephant and Bengal tiger. The region is home to one-third of the tiger population and more than half of the elephant population of India. There are four Project Tiger reserves and four Project Elephant reserves in the state which include Anamalai, Mudumalai, Sathyamangalam and Kalakkad-Mundanthurai. Other threatened and endangered species found in the region include grizzled giant squirrel, grey slender loris, sloth bear, Nilgiri tahr, Nilgiri langur, lion-tailed macaque, and Indian leopard. Kanyakumari is the southernmost tip of mainland India provides scenic view of sunset and sunshine over the Indian Ocean. Water falls like Hogenakkal Falls and wildlife sanctuaries are located across the state.