The beach of Feniglia, next to Porto Ercole, is a strip of sand 7 Km long connecting the Argentario to the mainland. The sand is fine and pure. There are a few bathing establishments and for the most part the beach is free. If you like walking you can find isolated points in the summer too. The entire beach is flanked by a beautiful pine forest known as the Feniglia Dune Nature Reserve, which is a protected natural.