The wealthiest man in India has built a new estate that sets the bar for opulence and ostentation. Mukesh Ambani's $1 billion home in Mumbai, named "Antilia" after a mythical island, requires a staff of 600 to man its gym, dance studio, ballroom, guest rooms, movie theater, lounges, garden, 160-car parking lot, and three helicopter pads, the Telegraph reports. All that in only 27 stories. Ambani is chairman of Reliance Industries, a conglomerate with oil, retail, and biomedical divisions. He's the fourth richest man in the world.