Chennai (formerly known as Madras) is the capital city of the Indian state of Tamil Nadu. Located on the Coromandel Coast off the Bay of Bengal, it is the biggest cultural, economic and educational centre in South India. Chennai is known as the "Detroit of South Asia" for its automobile industry. It is the fourth-largest city and fourth-most populous metropolitan area in the country and 36th-largest urban area in the world. Chennai is one of the most visited cities in India by foreign tourists, and 38th most visited city in the world.The Quality of Living Survey rated Chennai as the safest city in India.Chennai attracts about 45 percent of health tourists from abroad arriving in the country and 30 to 40 percent of domestic health tourists. As such, it is termed "India's health capital".With temples, beaches and centres of historical and cultural significance, including the UNESCO Heritage Site of Mahabalipuram, Chennai is one of the most visited cities in India. The city serves as the gateway to the southern part of India with tourists landing in the city and starting their trip to the rest of the region. Chennai was the most visited Indian city by foreign tourists in 2009 and issued the third highest number of visas on arrival in 2014. In 2011, Chennai was ranked 41st in global top 100 city destination ranking, with 3,174,500 tourists, a 14 percent increase from 2010. About 830,620 domestic tourists arrived in Chennai in March 2011. Top foreign nationals visiting the city include those from Sri Lanka, Malaysia, Singapore, United Kingdom, France and United States. As of 2012, the city had 21 luxury five-star hotels with over 4,500 rooms in the inventory.
Coimbatore, also known as Kovai, is a major city in the Indian state of Tamil Nadu. Located on the banks of the Noyyal River surrounded by the Western Ghats, it is the second largest city in the state after Chennai and the sixteenth largest urban agglomeration in India. It is administered by the Coimbatore Municipal Corporation and is the administrative capital of Coimbatore district.It is one of the fastest growing tier-II cities in India and a major hub for textiles, industries, commerce, education, information technology, healthcare and manufacturing in Tamil Nadu. It is often referred to as the "Manchester of South India" due to its cotton production and textile industries. Coimbatore is also referred to as the "Pump City" and it supplies nearly half of India's requirements of motors and pumps. The city is one of the largest exporters of jewellery, wet grinders, poultry and auto components with "Coimbatore Wet Grinder" and "Kovai Cora Cotton" recognized as Geographical Indications by the Government of India.Coimbatore has a pleasant climate due to the presence of forests to the north and the cool winds blowing through the Palghat gap in the Western Ghats. Under the Köppen climate classification, the city has a tropical wet and dry climate, with the wet season lasting from October to December due to the northeast monsoon.Coimbatore district is in the western part 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