I've been playing quite some time and often come across some situations which irritated me slightly. Canal As you all know, if you build a city with water on each side, a ship can pass right through. This can be a huge advantage, as the city operates as a canal. Not always is it possible to build a city at such a spot though. Therefore I thought of a terrain improvement, 'Canal', which would grant naval units to enter the tile. Of course, those units could not move further inland. If a naval unit would end its movement on a canal, a land unit could easily 'trample' it the same way a naval unit can destroy an embarked unit. Bridge You'd need one work boat in order to construct a bridge. Making one would cost you the work boat, naturally. This would create a connection between two landmasses with only one water tile between them, so no chained bridges. Of course the bridge could be pillaged easily. Outpost Some times I've wanted to grab a resource from a distant location, but building a city so far away wouldn't prove fruitful, especially if it's located in deep snow or tundra. An outpost would most likely be a 'mini-city', built with a worker. This mini-city couldn't grow above the population of 1, would have a sphere of influence of 0 (only the tile the outpost has been built), which could be expanded only by buying land. An outpost couldn't produce anything, nor defend itself. An outpost couldn't be annexed or conquered; only pillaged and thus, destroyed. Tell me what you think! I doubt I'll ever see these contraptions in the game, but I'd like to know whether my designs gather any interest. Oh and do tell your own ideas for terrain improvements if you have any!