Biggest slums of the World

3.    Dharavi, Mumbai, India

Slumdog Millionaire was filmed right in this slum which is home to several small-scale businesses and boasts of an informal economy valued at $1 billion annual turnovers.

There have been several attempts to develop the slum as it sits on a prime estate with strongholds on India’s financial strength. It has a population of 1 million dwellers.