Kerala's beaches, backwaters, lakes, mountain ranges, waterfalls, ancient ports, palaces, religious institutions[163] and wildlife sanctuaries are major attractions for both domestic and international tourists.[164] The city of Kochi ranks first in the total number of international and domestic tourists in Kerala.[165][166] Until the early 1980s, Kerala was a relatively unknown destination compared to other states in the country.[167] In 1986 the government of Kerala declared tourism an important industry and it was the first state in India to do so.[168] Marketing campaigns launched by the Kerala Tourism Development Corporation, the government agency that oversees the tourism prospects of the state, resulted in the growth of the tourism industry.[169] Many advertisements branded Kerala with the tagline Kerala, God's Own Country.[169] Kerala tourism is a global brand and regarded as one of the destinations with highest recall.[169] In 2006, Kerala attracted 8.5 million tourists, an increase of 23.7% over the previous year, making the state one of the fastest-growing popular destinations in the world.[170] In 2011, tourist inflow to Kerala crossed the 10-million mark.[171]