10 mysteries hidden beneath the ocean floor that scientists still can’t explain

In order to protect the San José galleon from looting, the Colombian Government has kept the location of the wreck, which was submerged near Cartagena in 1708, at a depth of 600 meters, a government secret. There are vast amounts of gold and emeralds aboard the vessel. Additionally, legal disputes continue between Colombia, Spain, and recovery companies over who owns the ‘Holy Grail’ of shipwrecks.

PC: Wikipedia