The Bijagós islands are some of the least-visited in West Africa. The Bijagós archipelago, comprising 18 major islands and dozens of smaller ones, covers 2,500 sq km of ocean. It belongs to Guinea-Bissau, a tiny former Portuguese colony wedged between Senegal and Guinea. Life on the islands, which have Unesco Biosphere Reserve status, seems to tick along much as it has done for hundreds of years. While the beaches are pristine and white, there’s rarely anyone on them except the odd fisherman.