Replying to
@CD403G
yes, indeed in Plato's description Atlantis was round and used moats to make an island -for defensive reasons - so really the design for Utopia has not developed much at all, since 423 BC
Replying to
@MrEwanMorrison
These appear to be images of Atlantis, based on Plato's description of a city with a ringed system of canals. Many people believe the original city was / is located in West Africa. The Richat formation in Mauritania.