Stretching for more than 1250 miles the Great Barrier Reef is Earth's largest structure built by living organisms Intricate and varied layers of life creatures that defy imagination and fill the eye with beauty populate its coral nooks and crannies We invite you to join awardwinning photographer David Doubilet on a visit to the home of what he calls 'one of the great pulses of the planet' in this National Geographic Magazine sight and sound multimedia presentation