The Mysterious Baltic Sea Object

Finding something strange on the ocean floor isn't really a stretch. So when some Swedish divers, part of the Ocean X team, went treasure hunting, they found a couple of weird formations on the Baltic seafloor. "We had been out for nine days and we were quite tired and we were on our way home, but we made a final run with a sonar fish and suddenly this thing turned up," said team leader Peter Lindberg at the time.

In a radio interview, Lindberg gave a more detailed explanation of what the team saw. "It has these very strange stair formations, and if it is constructed, it must be constructed tens of thousands of years ago before the Ice Age," he said in a radio interview, according to NBC News. He also acknowledged that it could be a natural formation, like a meteorite.

And that was pretty much fair play to let our imaginations run wild. Were these parts of a crashed UFO? A shipwreck? The lost city of Atlantis? A meteorite? Whatever it was, it seemed to be utterly bizarre, a mystery.