In the Coral Sea, off the coast of Northern Queensland lies the Great Barrier Reef.

Stretching 2300 kilometres along Australia's Northeastern tip, a covers an area of approximately

344,000 square kilometres.

An underwater maze are almost 3,000 individual reefs and more than 900 islands.

The reef has the world's largest collection of coral and over 1500 species of tropical

fish, reptiles and turtles.

Seeing clearly from space, it is the largest living structure on earth.

It is a world heritage site and known as one of the seven natural wonders of the world.

Tourists are drawn to the warm, crystal clear waters and bright tropical marine life,

a scuba diver's paradise.

Dive operators rely on the $3 million Australian dollar generated each year by the tourist market.

They provide everything from glass bottom boat tours, day snorkeling trips, overnight

adventures and for the more experienced divers, extended cruises with daily scuba diving

at remote locations.

One of the most famous shipwrecks of the reef is the SS Yongala, which disappeared in 1911.

The Yongala was a passenger ship which was on route from Melbourne to Keans, its 99th

voyage in Australian waters.

The ship had not yet been fitted with wireless messaging capabilities, so when a tropical

cyclone hit, the captain had not received the signal to take refuge.

It sank, taking all 122 passengers and crew with it.

The wreck was not found for almost 50 years, and when it was, it was found in near perfect

condition.

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