Mysterious Doors

[Alberel]

It is explained in the quest that we are unable to find a way to enter the last two internment hulks so, instead, we try to enter them through the aetherial curent that brought us to Dalamud's Talons at the end of the first two hulks. The actual Hulks are in The Burning Wall and The Singing Shards.

Is it actually confirmed that the third hulk is under the burning wall, or have people just assumed that? It seems rather odd to me that they would design an obvious entrance to the fragment, complete with a marked path on the map, and then not use it... It was actually rather pathetic watching that scout report that he could find no entrance there when he was stood right next to it.