Tall Walls

Example, have a forest scene and at one end of the map is a castle that has walls multiple levels higher. Could be based on the levels chosen when making a map. Example if its a 3 level map, I could stand walls on top of each other, creating a high walled castle on the outside. Would help with creating castle turrets as well on the outside and being able to flesh out and decorate the inside of those having only the inner walls of turrets open.

Extra: The drawbridge or doors/gates could adjust their height based on those walls like a portcullis or drawbridge for that scenario.