Where: Cote D’Azur, France
Price: $736 million
Now this is ultra luxury.The Villa Leopoloda was built by King Leopold II of Belgium in the year 1902. This $736 million mansion is located on the French Riviera and was purchased by Russian billionaire Prokhorov, who is so rich he lost billions to the latest economic collapse and still had enough fun money to buy himself a three-quarter-billion-dollar summer home. It has 27 stories, 19 bedrooms, 14 bathroom and a rumored 50 full-time gardeners.