Dharavi is the largest slum in Mumbai and one of the largest slums in Asia, located in central Mumbai. It has an estimated population of 600,000 to 1 million people living in about 2.5 square kilometers. Koli Wada is a fishing village, Dhobi Ghat is an open-air laundry, and Bhiwandi is actually a city in Thane district, not a slum in Mumbai.