Another huge blue hole has been found in the ocean

In the water area of Chetumal (a bay off Mexico), scientists have identified the second deepest “blue hole” of the Earth. In fact, it is a huge sea cave with a depth of about 274 metres.

Data obtained during dives, as well as with the help of echolocation and samples, indicate that the surface area of the hole is at least 13.7 square metres, and its sides are very steep.