Bottom line: Captiva, Florida, is a small, 1.64-square-mile-island located off of Florida's southwestern coast.
The island is dotted with golf clubs, mansions and yachts. Its most famous resident was the pop artist Robert Rauschenberg, who lived here until his death in 2008.
Note that the median home price is skewed because tiny, 580-square-foot apartments go for around $330,000.