As before, this is not entirely my original creation. The castle is a (heavily) modified version of Azzy's Large Castle, and the dungeon beneath it was originally designed by Richard Baker from Dungeon Magazine #101.
This file includes corrections to several mistakes that made it into the previous version. My apologies to those who downloaded that file.
The castle and dungeon include redstone, command blocks, spawners, and everything needed for an afternoon's adventuring. Enjoy,.