Reported UFO Shapes over the years. Some are alien/Nephilim made, Earth Gov made and some are not solid but are spirits that shape shift into the image of a UFO. If you've ever seen one that can't hold it's shape lol I have!
The Sunken City of Baia, Italy. It was a Roman seaside resort on the Bay of Naples. Baiae was sacked by Muslim raiders in the century CE and was deserted because of malaria by The last person left did not turn off the water and now it is all under water.