Here's a collection of USA structures from Command & conquer Generals . Snowy007 made these so be sure to check out his minecraft server. Minecraft Server IP: 220.127.116.11
this is included in the world map download as a separate file. how to use them:
- extract the .zip file download
- open the exacted folder and then open the folder within that
- drag all the .schematic files into your schematic folder found in .minecraft
- use MCedit to load them into your worlds!