Little City is a small city built in the old world size of Minecraft Pocket Edition. It includes several roads, bridges, and skyscrapers leading to the center of the city. It is not exactly the grandest city you have come across but it is surely a nice little creation which could be used to expand on and build towards something bigger. Also, remember that you can use the Make Infinite! feature to make this an infinite world. This can be found by pressing the edit button in the world list.
Download link for the Little City Map
All credit goes to Mort1999Download