I envision this massive round structure with landings every 35-50 steps. A large, wide archway leads immediately to imposing steep stairs going up.
To the left of the entry arch are 3 smaller arches that lead into the stables.
A door on the right at the base of the stairs leads to the only room accessible inside without climbing stairs. (Visible on the second, color drawing.) This is where visitors are met and left to wait for their host(ess).
The rooms themselves are often insanely tall. There are several secret doors high up on the walls that shortcut to areas farther up the spiral.
The owner of this tower is a natural flyer and uses the stairs to slow down and exhaust potential enemies. There are likely traps along the way the turn these stairs into the biggest slide ever.
By the time I got to identifying the levels by color, some of the rooms changed which landings they opened onto. At the bottom is a newer color version with the updated room numbers.
Levels
Level 0 – ground
Stables
Reception Room (1) – windowless
Level 1 – light green rooms
On the first landing (30×10) are 2 doors on the left (2, 3) and a door on the right (4). There are no windows in the rooms on this floor.
Level 2 – dark green rooms
On this landing (20ft x 10ft) is a door on the right (6) and one on the left (5).
The room on the left (5) is about 45×30 with a 40 foot ceiling. Large picture windows on the back wall do not open.
The room on the right (6) is 20×10 with a 400ft high ceiling, shrouded in darkness. It feels more like a chimney than a room. In the right back corner is a small hidden panel (gnome size) about a foot off the ground that leads into a 10×15 storage area (6b). On the back wall, abutted against the ceiling is another secret door that leads to landing #13.
Our flying homeowner uses this as a shortcut to the upper levels.
Level 3 – light blue
On this landing (30×10) are 3 on the left (7, 8, 9) and a door on the right (10).
Level 4 – orange
Landing is 15×10 with a door on the right (13) and 2 on the left (11, 12).
Level 5 – pink
Landing is 20×10 with a door on the right (16) and 2 on the left (14, 15).
Level 6 – red
Landing is 20×10 with 2 doors on the left (17, 18).
Level 7 – fuchsia
Landing is 30×10 with 2 doors on the left (19, 20) and 1 to the right (21).
Level 8 – dark red
Landing is 20×10 with 2 doors on the left (22, 23).
Level 9 – dark purple
Landing is 30×10 with 2 doors on the left (25, 25) and 2 on the right (26, 27).
Level 10 – dark orange
Landing is 20×10 with 3 doors on the left (28, 29, 30).
Level 11 – green
Landing is 20×10 with a door on the right (31). Going up the stairs, it would be easy to miss this door.
Level 12 – light yellow
Landing is 20×10 with 2 doors on the left (32, 33). The smaller room has a small hidden panel (gnome size) on the right wall about a foot off the ground that leads into a hidden room (33b).
Level 13 – reddish orange
Landing is 20×10. On the left wall is the hidden door that connects to the 400-foot tall room on level 2. Falling through this door could hurt a lot.
On the right are 2 doors (34, 35). The room directly across from the secret door has a 160’ high ceiling. In the far right corner, abutted against the ceiling is another secret door that leads to room on level #17.
Level 14 – purple
Landing is 20×10 with a door on the left (36) and the right (37).
Level 15 – aquamarine
Landing is 20×10 with 2 doors on the right (38, 39).
Level 16 – yellow
Landing is 20×10 with 2 doors on the left (40, 41).
Level 17 – gray
Landing is 20×10 with 2 doors on the left (42, 43).
Top Level – dark brown
A single door at the top of the stairs leads to a large room (44) with curved walls. The top of the ceiling comes together at a point in the center. Windows circle the point, looking up at the stars.
I want to figure out how to represent this building in 3D. I think there are some clever things I can do between levels, but it is hard to visualize in this 2D format.
Donjon’s Random Dungeon