Cairns / Port Douglas Outer Reef
Australia
The outer section of the Great Barrier Reef reached by day-boat trips from Cairns and Port Douglas is the most heavily visited diving and snorkelling area of the reef system.
Tour operators run daily boat trips from both Port Douglas and Cairns out to the outer Great Barrier Reef for scuba diving and snorkelling. Individual outer reefs in this area include Flynn Reef, noted for coral diversity. No source gives a verified centre coordinate for this outer-reef diving area as a whole, so none is set here.