3. Villa Leopolda – $750 Million
No one can say that King Leopold II of Belgium didn’t know how to treat his mistresses since he actually had this lavish home constructed for one of them! This massive home is currently owned by Lily Safra, a Brazilian socialite, and noted philanthropist. Villa Leopolda is located in the French town of Villefranche-sur-Mer on the French Riviera. The home is situated on ten exquisitely manicured acres and features gardens that require a staff of 50 to properly maintain. This home is also somewhat of a movie star, having been featured in the Alfred Hitchcock movie To Catch A Thief.