A thousand years ago there was a city here.
And people. So many people. They're still here, their bones are, under the water, ten feet down, covered in silt. There was a Warlord who ruled one of the big, mostly-intact buildings — he had his people dive down, bring up the skulls, and he made an immense sculpture out of them to intimidate his enemies.
We don't have Warlords anymore. We're building again: boats to fish in the deeper water and homes that won't crumble with age.
Our children, or their children, will drain the city. Maybe bury the bones.