Latest update to this castle i use in survival. I use it heavily modified so there is plenty of room your modded game if you like. It now features nether and end portals, and functioning spawners and dungeons that can be turned off with redstone switch using redstone lamps. This is a large build, many many rooms. approx 64 x 64 and goes deep under ground.
Structure will place with you standing at the SW corner, ground level.
minecraft v 1.16.5