The ocean is the final frontier for many people. The vast ocean that covers our planet has swallowed up so many things from planes, people, and ships. The depths of the sea have turned into a treasure trove of lost things, forever preserved underwater.
So when a ship is abandoned, it is usually due to some sort of disaster or tragedy. Oftentimes, ships that are abandoned are too massive and heavy to move, and they are doomed to be left where they are at. Eventually, when other ships meet the same fate in the same area, the space turns into a graveyard for abandoned ships.