Lonkrafts
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Had fun. The map is indeed amusing. I cleared my square in a month and a half, found 3 dungeons (with almost a full dragon set, only instead of a necklace, there's an extra ring, with mines and dwellings - is part of the latter inaccessible, as intended? and with a bunch of kibitkas). I can see a piece of another one, but I couldn't find the entrance. 5 hints - I didn't understand any of them, except perhaps the one about the truth - from the comments, I see that I had to kill the phoenix. Is that it?
And I was very pleased with the necropolis corner:
And the message "the truth is somewhere nearby" hints that there is a secret nearby. And it doesn't relate to the phoenix.
Also, you could provide the coordinates of the place from which you saw the other piece of the dungeon.
As for the inaccessibility of some buildings, yes, it's a bug. It simply wasn't displayed in the editor where they should be accessible.