With a growing population of over 20m (not far off all of Australia!), it's incredibly poor, although oddly it's also 6th in the world for billionaires. Mumbai has the world's most expensive "private" house, a 27 story mansion with 600 staff and rumoured to cost over 1 billion to build. But, walk the streets like I did, and you're stepping over people, vendors, rubbish, dead things, and broken infrastructure. This is me, my feet, strolling through the city.