#2 – Villa Leopolda, Villefranche-sur-mer, France
The second most expensive home in the world is a mesmerizing villa located in French Riviera. The value for this residence, which was built by King Leopold II, was set at around $750 million in 2008. It is believed that King Leopold II built this house for one of his mistresses, since he built other waterside homes for a few women in his life. It is currently owned by Lily Safra, a Brazilian philanthropist.