So once you unlock iron, you can make the the wood\iron beams. you can make a tower 18(?) stones high. so they can get pretty high just by themselves.

I like the mountain side idea. I have thought about it before. and really you could make one heck of a large stone castle, tower, or whatever. and it would prolly look pretty cool scaled down the side of a mountain.

Yeah I still enjoy the game. had 500 hours in the first week or so. im just getting back to it, 5th play through. new world, new character. trying some different builds this time, and taking over the largest area I have tried for, so far.

Keep on building!