Location: Skorpios
Purchased: $153 million*
Current Value: $160 million*

Russian billionaire heiress Ekaterina Rybolovleva did what Russian billionaire heiresses do: buy private islands. The twenty-four-year-old heiress bought Skorpios, one of the most famous private islands in Greece. The Rybolovlev family bought Skorpios for $153 million in 2013.

The island has had a lot of famous owners, including Aristotle Onassis, the former husband of the late Jackie Kennedy. The Rybolovlev family has big plans for the island, as they plan to turn it into a luxury resort for people with “ultra-high net worth.” Considering that the Russian oligarchs have a net worth of $9.1 billion, this could be a new Billionaire Bunker.