Former US vice-president Joe Biden has taken time out to relax on this private island owned by his brother, James Biden Jr, and his sister-inlaw, Sara. Now up for sale because the owners want a place closer to their primary residence further north, Keewaydin Island is a two-hectare tropical retreat perched just off the mainland and only about 10 kilometres from downtown Naples. Across the water on the mainland is 80 hectares of nature reserve. In keeping with its rustic surroundings, the renovated five-bedroom main residence is built on stilts; it features slate floors, wood panelling, vaulted ceilings, and plenty of windows with views of the sea and the island’s greenery. Within its 4,000sqft of interiors is a ‘crow’s nest’ master suite, with a raised bed that has 360-degree views of the island and beyond. Entertaining spaces on the island include a waterside bar and beachside patio. Living on this island won’t mean you have to endure a Robinson Crusoe-style existence, though, because Keewaydin is powered by solar energy, while its classic Florida-style roof is coated with Nasa-developed paint to keep the temperature down. It also has its own well and desalination plant. High-speed internet connection via satellite allows constant monitoring of nature and other visitors – as well as access to the Sonos hi-fi sound system and HDTV.