Owner: Louis Moore Bacon
Purchase price: $11 million
In a bankruptcy court auction in 1993, Wall Street financier Louis Moore Bacon plunked down a cool $11 million for Robins Island, located off the coast of Long Island, New York.
Bacon, 55, has reportedly invested millions in restoring the 445-acre island, including importing oak trees to preserve its natural habitat. When the hedge fund manager bought the island, he gave $1.1 million to the Nature Conservancy to monitor rare and endangered species on the island , which include Eastern mud turtles. The billionaire has also built vacation homes for his family, along with a helipad.
After stepping in to help preserve undeveloped land on New York's New Suffolk waterfront in June, Bacon is set to receive the Audubon Medal for environmental protection next January. The society, which has awarded the likes Walt Disney and Jimmy Carter in the past, is also honoring Bacon for his conservation work on Robins Island, and his properties in North Carolina and the Bahamas.