To give you an idea, the ocean is one of the bodies of water that has been least explored in recent years, or rather forever. Not even 70% of its totality is known by human beings, which means that there are a huge number of species down there that our eyes have not been able to or may never be able to see.
However, despite the vastness of the seas that we have around us, we still do not have the technology or the necessary tools to explore it as required. Perhaps, that is why the curiosity of many has begun to be exemplified through different types of expeditions or projects that involve the discovery of objects or things lost or placed there in advance so that they become part of this wonderful marine ecosystem.
The Titanic, for example, is a legend in terms of how much it means to history, because although more than 100 years have passed since its sinking, there are still those who want to remove it from the bottom of the sea and expose it on land, although it is a complicated and almost impossible task.
The following examples are not of that magnitude, but they do represent a latent curiosity about its origin, its reason for being there or its strange and unusual appearance.