It's been a while since I posted a dungeon map, but here's an old fort-cum-leper colony I used for some additional encounters in my Pathfinder campaign of The Coils of Set. I actually put this together at about the same time as the Wizard's Bastle, and it's similarly inspired by L-shaped towers. This Old Fort was part of a series of multipath, nonlinear dungeons: It's organized so there are multiple ways to travel between dungeon areas. Each level will fit on a GameMastery flip map; here it is from bottom to top.
Old Fort: Lower LevelsWhen I ran this dungeon recently, this level was warded with an old, permanent guards and wards spell, and patrolled by gas spores, gray oozes, violet fungi, and a mind slayer telepath. In each corner, a stairway leads up to small towers in the northeast, northwest, southwest, and southeast corners of the fort. In the central area of the dungeon, just to the north and south of the large middle chamber, there are two chambers with a large shaft running through them. In these rooms, a small shaft opens in the ceiling that opens to the courtyard above, and a 10-foot-wide pit opens to deeper areas. Below this level, there is just a simple raceway patrolled by gelatinous cubes and other garbage-eating oozes, for waste disposal.
Old Fort 1FGates to the east and west provide access to the fort's courtyard, which is defined by four small L-shaped towers. Each tower has stairs leading up, and down to the dungeon below, as well as prison cells, barracks, and other rooms (There's an error on the stairs on the western towers on this level: the stairs are reversed). Two wells in the courtyard are actually used for waste disposal, and lead through the dungeon below to ooze-pits.
Old Fort 2FSimilarly to the first floor, stairs lead up and down. Most of these chambers have shuttered arrow slits that serve as windows.
Old Fort 3FThe large rooms of the top floor would feel quite spacious if not for the fact that the walls and ceiling of these attics are the angled wooden walls of the roof, so much of the space is fairly awkward. Large windows overlook the landscape of the surrounding region.