Coimbatore is situated in the west of Tamil Nadu, bordering the state of Kerala. It is surrounded by the Western Ghats mountain range on the west and north, with reserve forests and the Nilgiri Biosphere Reserve on the northern side. The Noyyal River runs through Coimbatore and forms the southern boundary. Coimbatore is known as the textile capital of South India, or the Manchester of the South. The rich black soil of the region has contributed to Coimbatore's flourishing agriculture industry and, it is in fact that successful growth of cotton growing that served as a foundation for the establishment of its famous textile industry. The first textile mills came up as far back as 1888 but there are now over a hundred mills. The result has been a strong economy and a reputation as one of the greatest industrial cities in South India.