2. Villa Leopolda (Villefranche-Sur-Mer, France)
Value: $750 million
Owner: Lily Safra – net worth: $1.27 billion
Villa Leopolda, reportedly built by King Leopold II for one of his mistresses, was worth a whopping $750 million at the time it was put up for sale back in 2008. This impressive estate, registered as a historical monument, even made appearances in two movies: 1948’s The Red Shoes and 1955’s To Catch a Thief.