The biggest Asian cities, from Beijing to Jakarta and from Mumbai to according to National Geographic, there were just three megacities. Megacities examines the infrastructure of eight iconic locations around the world: Las Vegas, Mexico City, Hong Kong, London, Paris, Sao Paulo, Mumbai and. National Geographic Nat Geo Wild Nat Geo People. Asia MEGACITIES. HOME · ABOUT. National Geographic explores Mumbai (also known as Bombay) as one of the world's Mega Cities. The documentary demonstrates how the city's railroad has to . Kristian Bertel posted this picture to National Geographic's Your Shot photo community. Check it out, add a comment, share it, and more. This is "National Geographic "Megacities - Mumbai"" by Little Red Robot on Vimeo, the home for high quality videos and the people who love.