Wait. I’m confused.
Didn’t you devise the labyrinthine corridors and hidden crypts that the zombies, dust bunnies, and basilisks use?
Didn’t you also require a GSP in order to do all this when we first began the renovations? (After Stag and Rexxie broke through the back wall of the Smoky Backroom.)
Time flies when you’re having fun...maybe.
Dryer buzzed. It’s the SOCKS. *shudder*
A simple answer: No.
Essentially, the "lower areas" were developed as traces of ores were followed by the tunnelers. Metal ores removed were converted into bracing and support structures to replace the rapidly diminishing presence of rock.
Another area that was unintentionally convenient for us was the limit imposed by the fracture zone. You see, it appears we built our Castle on the site of an old meteor crater, which gave us the dimensions that resulted in the present outer hull.
We simply built a bowl-shaped containment vessel comprising the Castle and grounds, the diminishing physical rock presence, and the somewhat haphazard layout of tunnels and grottoes underground.
One complication we hadn't anticipated was that our originating meteor was anything but normal. My contention is that it is the remnant of a small star-traveling vessel, perhaps only a lifeboat. But the only technological evidence for that possibility is the presumed presence of some forms of nanobots, which even after all this time and calamity, are still mindlessly trying to accomplish their original programming.
For me, this explains why corridors and stairways don't always take you to the same place when you try to follow the same path. Imagine that you are walking through a large office building, filled with corridors and doorways that are sometimes accessible to you and sometimes not. Unless you know how to open the doors, you are faced with simply following the choices that someone else has provided. Under such a circumstance, how could you not become disoriented?
You see? There's always a scientific explanation. Of course, you may notice that I haven't tried to explain the presence of zombies and dust-bunnies. I'm still working on that.