OldCastle is the majestic old castle, which was originally created as an attribute of the old world. The old world was the only available option for Minecraft Pocket Edition at the time. In this huge fortress is abysmal any room that will certainly need to travel and explore. If You want to use this generation in his world of survival, you need to try to export it into an infinite world in the game. Edit the world and click the "make infinite". Some parts of the resulting cards of the world can look pretty random, but this disadvantage can be removed by terraforming.