Stretching a full 2000 kilometres in length and made up of 3000 individual reef systems and hundreds of islands, Australias Great Barrier Reef is an icon, one of the natural wonders of the world and the largest living structure on the planet. This three-part series narrated by Monty Halls offers a definitive guide to the secrets of the reef - how it was created, how it works, the intricate relationships between its inhabitants and how climate change and other factors might shape its future. Using the latest specialist filming and visual techniques, the series captures the magic of the reef as it has never been seen before.