Posted just for fun; this isn't a new discovery, but reports about it surface intermittently. I would love for it to be a UFO, but have no belief that that's what it is. But I do love oceans, and treasure stories, and anomalous discoveries.
The Baltic Sea is a literal treasure trove for salvage teams and a "shipwreck laboratory" for researchers. The sea's low salinity levels help preserve objects that sink to the bottom. "Right now, we know about 20,000 objects, mostly shipwrecks, in the Baltic Sea. But I think there may be more than 100,000," said sonar expert Ardreas Olsson.