Many of them live in close proximity to bus or train stations although suburban residents spend significant time travelling southward to the main commercial district.[37] Dharavi, Asia's second largest slum (if Karachi's Orangi Town is counted as a single slum)[38] is located in central Mumbai and houses between 800,000 and one million people[39] in 2.39 square kilometres (0.92 sq mi), making it one of the most densely populated areas on Earth[40] with a population density of at least 334,728 persons per square kilometre.[41]