Some of my maps on the Atlas have towers as the map.

And search for Mapper: JimP and text in map tower.

Scroll down, and you will see several towers, towers of multiple levels, etc.

A bit of map on level 03. map 6 of 10.

While I moved the room numbers off to the side, I left some numbers, for locations, where the location is. I might just forget why it is there.

Anyway. Bridge, location 64. Why a bridge ? There isn't any water. At least, none is seen from the overhead view.

And there couldn't be more than a foot or two, less than a meter, clearance under the bridge ? Could there ?

Or maybe its an illusion, covering a pit. It is a long way down to level 4. Or maybe, it is just what it seems to be, a joke by the DM. :-) Or is it something creepy ?

Almost forgot this part.

The low walls are so you can see inside the rooms.

Next parts. Upper left. Then the upper right.

upper right.

upper right next.

Part of the center section. Yes, the stairs go through the wall.

That is it for the time being. I didn't place many of the possible symbols.

First is the area map, 475' x 380'. This could be refereed as open, or a cutaway.

By open I mean the stairs are suspended over nothing, or it is a long way down to rock or water.

Then I'll post parts so you can see details.

upper left first.

next upper left piece.