Unless Nintendo logic happens and they make a concrete living creature, it's probably just architecture. :thinking:
You really can't necessarily attribute that to "Nintendo Logic", my friend. In a mythical universe such as Zelda, there exist such beings as Golems, which are basically - in most modern portrayals - living constructs of stone or iron. They are usually giant. Golems are very popular in RPG and Adventure genres. :yes:
Keep in mind, I am NOT saying the dungeon in question is inside of a Golem; I'm just saying you can't attribute everything you don't understand in a Zelda game to "Nintendo Logic." :shake: