Mumbai formerly known as Bombay, is the capital city of the Indian state of Maharashtra. It is the most populous city in India, and the fourth most populous city in the world, with a total metropolitan area population of approximately 20.5 million. Along with the neighbouring urban areas, including the cities of Navi Mumbai and Thane, it is one of the most populous urban regions in the world. Mumbai lies on the west coast of India and has a deep natural harbour. In 2009, Mumbai was named an Alpha world city. It is also the wealthiest city in India, and has the highest GDP of any city in South, West or Central Asia. Mumbai has been ranked 6th among top 10 global cities on billionaire count, ahead of Shanghai, Paris and Los Angeles. Mumbai is the commercial and entertainment capital of India, it is also one of the world's top 10 centres of commerce in terms of global financial flow. The architecture of the city is a blend of Gothic Revival, Indo-Saracenic, Art Deco, and other contemporary styles. Most of the buildings during the British period, such as the Victoria Terminus and Bombay University, were built in Gothic Revival style.
The Mumbai Heritage Conservation Committee (MHCC), established in 1995, formulates special regulations and by-laws to assist in the conservation of the city's heritage structures. Mumbai has two UNESCO World Heritage Sites, the Chhatrapati Shivaji Terminus and the Elephanta Caves. Popular tourist attractions in the city are Nariman Point, Girgaum Chowpatti, Juhu Beach, and Marine Drive. Essel World is a theme park and amusement centre situated close to Gorai Beach, and includes Asia's largest theme water park, Water Kingdom.