My main world, done with no cheating (except for some ice and a dog spawner, but that doesn't really count). It is much more impressive in gameplay, as with all worlds. There is a huge pillar (5 X 5 open air) that leads all the way from the top (almost, not quite done) to the bedrock. There is an automated minecart system down to it. Overall I am quite happy with it, but no where near done!