Exceptionally Preserved Ancient Ships Discovered in the Black Sea
"The wrecks survive in such good condition because at a certain depth the Black Sea has anoxic, or oxygen-free, conditions preventing decay. Many of the ships sit at the bottom of the sea with their masts upright, their rudders still at the ready and their cargo bays full of untouched goods."As far as I know, this oxygen-free water layer below approximately 150 meters from the surface makes Black Sea unique. Virtually anything drowned in it from the beginning of marine history is in perfect condition. If I was a beginner archaeologist who dreams of big discoveries then I'd look at the Black Sea in the first place.