[SunkenCiv]

A 3-D view of the Lambayanna underwater site

[Eagles6]

"We do not know why it is surrounded by fortifications."

To keep enemies out? Just a guess...

[bike800]

Obviously they were burning fossil fuels to the point the climate changed and the sea rose and covered the cities

[wildbill]

One of many sites which probably gave rise to the legend of Atlantis sinking into the sea.

I don’t think you would find that many artifacts if the city had been evacuated due to a gradual inundation by rising waters. Probably a seismic event like the one that sank Port Royal in Jamaica in 1692.