The Castle
Built block by block for one job: holding every building material in the game where you can reach it.
The outer walls
Walls two blocks thick with a walkway on top. The gates are four metres wide, room enough to carry anything in.
Four towers
Each corner tower has a spiral stair from the ground to the top, with doors onto the wall walk on the way up.
Bridges
Diagonal bridges run from the towers to the third floor of the keep.
The keep
The main building. Its stairs stay clear of the corners, so you never get stuck carrying a load.
The spire
A hollow spire with its own spiral stair. The view is worth the climb.
The flame hall
Fifth floor of the keep: every building material in its own column of chests. This is the store.