Along with the nearby Thane and Navi Mumbai, Mumbai is home to 21 million individuals, and is among the most heavily populated areas of India. The city is energetic, multicultural and has one the biggest slums on earth along with some of the priciest houses. To understand the vibe of this mega-city it's better to visit on your own. If coming from nearby cities, check for the schedule, say, Surat to Mumbai train timetable, and make further reserva...