The Ambani family owns the world's most expensive private residence. Take a look at their Mumbai tower, Antilia, which cost $1 billion to build, has 3 helipads, and contains a 168-car garage.

The Ambani family owns the world's most expensive private residence. Take a look at their Mumbai tower, Antilia, which cost $1 billion to build, has 3 helipads, and contains a 168-car garage.

The Ambanis' tower, called Antilia, rises above the Mumbai skyline.Ashwin NagpalThe Ambani family, which just threw a pre-wedding party for son Anant, has built a tower in Mumbai. The 27-story house, called Antilia, is said to be the most expensive private residence in the world.Antilia's interiors have rarely been photographed, but it has a 50-seat cinema and three helipads.Mukesh Ambani, India's richest man, and his family live in a fittingly …