After carful deductions about the size and shape of the building that made it stand out from the rest of the buildings in the neighborhood Aldrich had determined that it should be some kind of base for protection. Basically it was a barracks.
Aldrich had intended to leave the barracks for last but after defeating the Umvorax and the direwolf today he had determined that there was nothing to fear from this barracks.
Besides his sense of urgency didn't diminish just because no new changes happened in the nightmare realm ever since the crystal rain.
For the time being Aldrich had no intention of obeying the voice that talked to him and showed him those visions.
First Aldrich couldn't trust some unknown voice out of nowhere. Secondly, even if he wanted to go to that chapel he didn't know the way to go there.