An 11-day trip to São Tomé and Príncipe costs from £2,745pp, on a half-board basis, with Rainbow Tours (rainbowtours.co.uk; 020 3733 6778). The tour includes a three-night stay at Omali Lodge on São Tomé, to explore the island in a 4WD and drop in on old coffee and cocoa plantations. You can also go in search of rare birds, such as the dwarf olive ibis and São Tomé grosbeak. The rest of your time is spent on Príncipe, where you can kayak through mangrove forests, watch whales off the coast and hike through rainforest to swim in hidden coves. The price includes return flights to São Tomé with TAP Portugal via Lisbon.