The Mahogany Ship refers to a putative early Australian shipwreck that is believed by some to lie beneath the sand in the Armstrong Bay area, approximately west of Warrnambool in southwest Victoria, Australia. In many modern accounts it is described as a Spanish or Portuguese caravel after the wreck was associated with the theory of Portuguese discovery of Australia by Kenneth McIntyre in his 1977 book "The Secret Discovery of Australia." The most recent research has questioned this theory and provided other explanations.