Detaching themselves from the Florida peninsula and mainland USA itself are the Keys and the tallest of which, happens to be for sale.

Broad Key is a 63-acre property with a 5-bedroom main house, a guest house, and caretaker's cottage and boathouse located in the exclusive community of Ocean Reef.

The Island is complete with its own water storage, solar generator power system, satellite dish communication and video security equipment not to mention a helicopter landing area.

Location: Two miles from John Pennekamp Coral Reef State Park.

The island is listed at $20 million on sothebysrealty.com putting it at the higher end of Florida private islands for sale.