Tamil Nadu (/ˈtæmɪl ˈnɑːduː/ TAM-il-NAH-doo; Tamil pronunciation ); literally The Land of Tamils or Tamil Country is one of the 29 states of India. Its capital and largest city is Chennai (formerly known as Madras). Tamil Nadu lies in the southernmost part of the Indian Peninsula and is bordered by the union territory of Puducherry and the South Indian states of Kerala, Karnataka, and Andhra Pradesh. It is bounded by the Eastern Ghats on the north, by the Nilgiri, the Anamalai Hills, and Kerala on the west, by the Bay of Bengal in the east, by the Gulf of Mannar and the Palk Strait on the southeast, and by the Indian Ocean on the south. It also shares a maritime border with the nation of Sri Lanka.Tamil Nadu is the eleventh largest state in India by area and the sixth most populous state in India. The state was ranked sixth among states in India according to the Human Development Index in 2011. Tamil Nadu is the second largest state economy in India with ₹4789 billion (US$71 billion) in gross domestic product. The state has the highest number (10.56 per cent) of business enterprises and stands second in total employment (9.97 per cent) in India, compared to the population share of about 6 per cent. Tamil Nadu was ranked as the third most developed state in India based on a 'Multidimensional Development Index' in a 2013 report published by a panel headed by current RBI governor Raghuram Rajan. Its official language is Tamil, which is one of the longest surviving classical languages in the world.Tamil Nadu is home to many natural resources, classical arts, classical music, classical literature, Hindu temples of Dravidian architecture, hill stations, beach resorts, multi-religious pilgrimage sites, and eight UNESCO World Heritage Sites.