Antilia - the world's most expensive residential property after Buckingham Palace. 27 floors with extra-height ceilings (equivalent height buildings have 60 floors). Panoramic views of the Arabian Sea. Space for 600 staff. Parking for 168 cars. 50 seat home theatre. 9 elevators. 3 helicopter pads. 2 swimming pools. A Jurassic Park-sized gate with light infantry guards. Cost: $1 billion.