Originally Posted by Kanji

Now that you bring it up, though... It looks like Triforce symbol would actually be seen in an upside-down state if one were to look back at the blocks after reaching the entrance to the Inverted Stone Tower. Perhaps this is also reflection of how the Goddesses had condemned Termina to a cruel fate (Feline Witch made a similar point earlier in the thread, although he was referring to the beginning of the game). Perhaps such upside-down Triforces are meant to point downwards with their triangular shape as well, as if to signify the descent of the Terminians into their Hell.

Just tossing some ideas around here... I unfortunately don't have too much evidence to back them up.