Thirty years ago, Chris Parrott co-founded the travel specialist Journey Latin America. At the time, the region was in turmoil, from Mexico and Guatemala to Argentina and Chile. Today Latin America is largely calm, peaceful and accessible (except, temporarily, Machu Picchu in Peru – see page 15). But there is still plenty of virgin territory. In September, Chris will lead a prospecting trip to the territory that Evelyn Waugh described as "gobs of Empire": the Guianas. He tells Simon Calder abou...