Antilia, Mumbai, India - $1 billion

Fair Field, Sagaponack, N.Y. - $248.5 million

Broken O Ranch, Augusta, Mont. – between $90 million and $132.5 million

Kensington Palace Gardens, London, U.K. - £117 million

Kensington Palace Gardens, London, U.K. - £57 million as of 2004

Ellison Estate, Woodside, Calif. - $200 million