That is Antilita, the most expensive personal residence in the world. It is worth about $1 billion. The home belongs to the 19th richest man in the world, Mukesh Ambani, chairman of Reliance Industries. The home requires a staff of 600 full time employees. Antilita boasts 27 stories, yet it's actual height is closer to 40 stories tall. This is because several floors are 2-3 times the normal height of a floor.