A Gothic mega castle built around c...

A Gothic mega castle built around create mod integrations the top most layer 4 is the towers and rooftops, the next layer 3 below layer 4 is the main castle structure and this is at the main ground level. Below this underground is layer 2 and is the industrial level that will include tree farms, casing factories, and logistic tunnels and shafts, the final layer 1 is a hidden industrial layer that includes train tunnels, frieght depots and storage.