Neva

Thousands of years ago, there was a sea on the site of St. Petersburg, called the Litorin Sea in modern times, because of the gastropod litorins that lived in the Baltic waters.
Granite was gradually formed from the shells of ancient mollusks that settled at the bottom of reservoirs, which after the centuries clothed Neva in its red and black.
This film is about how a fabulous city grew out of water and stone.