In the four-part series NATURE'S TREASURE ISLANDS: A JOURNEY TO THE UK OVERSEAS TERRITORIES, geographer, field biologist and nature photographer Stewart McPherson is on a mission to become the first person to visit all 14 British Overseas Territories. From the island of St. Helena to the British Antarctic Territory, he follows in the footsteps of history's greatest explorers, adventurers and naturalists to bring Britain's global history to life.