The tropical rainforest ecosystem of the
Daintree Rainforest is one of the most complex on Earth. Its plant diversity and structural complexity is unrivalled on the Australian continent and represents the origins of other Australian flora.
Millions of years ago, the Australian continent was warm and humid and rainfall was plentiful. During this time rainforest thrived in places such as the Uluru (Ayers Rock) region. As Australia became more arid, there were fewer and fewer places rainforests were able to survive. In the Daintree region, however the climate and topography were ideal, so the area became a last remaining refuge for rainforest. Within this refuge many species were able to live comfortably without reason to change. Their descendants that are still living today retained many of their ancestors' primitive characteristics, some dating back 110 million years.
The Great Barrier Reef is the world's largest coral reef system, composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres (1,400 mi) over an area of approximately 344,400 square kilometres (133,000 sq mi). The reef is located in the Coral Sea, off the coast of Queensland, Australia.
The Great Barrier Reef can be seen from outer space and is the world's biggest single structure made by living organisms. This reef structure is composed of and built by billions of tiny organisms, known as coral polyps. It supports a wide diversity of life and was selected as a World Heritage Site in 1981. CNN labelled it one of the seven natural wonders of the world. The Queensland National Trust named it a state icon of Queensland.
Both, The Daintree Rainforest and Great Barrier Reef, have been listed as UNESCO World Heritage Sites.