The oceans contain 3 million shipwrecks, with $60 billion worth of treasure, and fewer than 1% of the wrecks have been explored…..

The average person can probably name a couple of the more famous shipwrecks — maybe the Titanic or Queen Anne’s Revenge — but there are many, many more that have sunk from sight and public recollection. Altogether, it’s believed that at least 3 million such wrecks dot the ocean floors.