This £300 million mega estate is located in Marbella, Spain (coordinates 36°30’08.0″N 4°56’27.5″W) and is currently abandoned. It was the holiday home of the late King Fahd, who was the prime minister of Saudi Arabia and leader of the House of Saud. It was said to be home to all 13 of the king’s wives. At the time of his death in 2005, he was estimated to be worth £25 billion.
Source: Luxury - homesoftherich.net