if I've got it right, that means you are in the second section already, and reaching the farthest outpost. If they offer cursed armor/underwear than I think we're talking about the same place. If so, there shouldn't be anything past it yet, right outside should be some of the more unique enemies (dark knight, jester, minotaur at least that's where they spawn for me) if we're thinking of the same area, the only way to "advance" is to go back through the labyrinth(minotaur) to the main world, which will take you back to mount xiuh if memory serves me right.
If you have advanced from the beginning and talked to the priest in the first town, I believe she gives you a quest for a cod piece, if you bring it back I think she requires it to be enlarged, by the witch from the cottage from the goddess of mount xiuh quest.
The main reason I'm not more sure, is because I've had trouble playing on my phone (not enough ram to deal with brigadines.) So I figure if I've got anything wrong someone would probably correct me.