Sasha Archibald at Cabinet Magazine:
Just off the coast of Espírito Santo, an island in the Vanuatu archipelago of the South Western Pacific, there is a massive underwater dump. Called Million Dollar Point after the millions of dollars worth of material disposed there, the dump is a popular diving destination, and divers report an amazing quantity of wreckage: jeeps, six-wheel drive trucks, bulldozers, semi-trailers, fork lifts, tractors, bound sheets of corrugated iron, unopened boxes of clothing, and cases of Coca-Cola. The dumped goods were not abandoned by the ni-Vanuatu people, nor by the Franco-British Condominium who ruled Vanuatu (then known as the New Hebrides) from 1906 until 1980, but by personnel of a WWII American military base named Buttons. At the end of the war, sometime between August 1945 and December 1947, the US military interred supplies, equipment, and vehicles under water.
more here.