We travel to two places known for their remarkable biological diversity. One, as you might expect is in the spectacular Amazon rainforest, home to millions of species of insects, plants, birds – many unknown to science. The other is a forest of a different kind – one you can swim through. It's a magical place of leaping dolphins, towering sea caves with painted ceilings and long stretches of isolated beaches. Both are threatened, especially by oil development, but are being protected in unique ways. Produced by Sprouts.