The Great Barrier Reef is the largest coral reef in the world, roughly parallel to the coast of Queensland, Australia, for almost 2,000km. This is the only living organic collective visible from Earth's orbit! The Great Barrier Reef is one of the wonders of the natural world - it is the world's largest coral reef ecosystem. It was declared a World Heritage area in 1981 and added to the National Heritage List in 2007. The reef is scattered with beautiful islands and idyllic coral cays and covers more than 300,000 square kilometers. The major attraction is Coral. Corals found in the Great Barrier Reef contain algae and the relationship between the algae produce oxygen and help the coral to remove wastes. When this relationship breaks down, the coral suffers and becomes bleached.
