240 million Euros ($310 million) – Lisbon Island, Portugal

Often touted as being as much as $350 million, it’s actually probably closer to $310 million these days. The island is virtually on the doorstep of Lisbon itself and is a massive 3000 acres. There has been talk of turning the island into a luxury golf course, complete with residential units, as the island is a prime spot for potential development and is unusual in the fact that is remains undeveloped whilst being so close to a heavily populated area such as Lisbon. The island will most likely be purchased by multiple investors with an eye to develop it into whatever they see fit.

Posted in: the Most Expensive Private Islands in the World