Martin's epic journey across the Pacific takes him to the Galapagos Islands for the third episode in the series.The legendary Galapagos Islands, a volcanic chain of 18 major islands, plus over 100 tiny ones, are 800 miles from the shores of South America. It's known as a ‘lost world' as many of its plants and animals exist nowhere else on earth, and until recently it attracted nearly a quarter of a million visitors a yearMartin is following in the footsteps of the great British naturalist Charles Darwin, who really put this place on the map when he sailed here in 1835. Last in series