There is a Web shooting mountain titan who is sitting in my gatehouse,
It has a abstract, Yet direct path to inside the fortress, But it seems to like sitting where it is. When I unlock the door he still sits there, Unless coaxed in by a dwarf or animal.

The save shows where he is sitting, The door is the only thing stopping him at the moment, To the far right on the other side of the fortress is a Up/Down staircase going up to the web farm 12-Z up.