Why the AI does not seem to see the benefit of placing cities on coast ? I have been experimenting more aggressive play style (normally I play very peacefully - often I have wars only if somebody attacks me) and I have captured several cities that are built only one tile away from coast. Wouldn't it usually be better to build cities on the coast, because then it is possible to build coastal improvements like harbor and it would be possible to build ships ? I think the AI should be fixed to better appreciate coastal city locations. Unless there could be added a way to build separate harbors for cities near the coast. Perhaps a new worker ability to build such separate harbors as tile improvements could be added. This new tile improvement would then give a city the normal benefits of a harbor and also ability to build other coastal improvements and ships. I guess there should probably be some limitations for this tile improvements: it could perhaps consume the worker, perhaps it should be possible to build harbor tile improvement only in a city radius and perhaps the city should "work" the tile in order to get the benefits (that would also nicely solve problem about overlapping city radius - the city that is "working" the tile would get the benefits). Perhaps the harbor tile improvement could start from a small dock and slowly become to a fully developed harbor (like cottages, which slowly develope to towns). What you think about this idea ? Isn't there also in the real world big cities with separate harbors ?