User blog comment:Maki Kuronami/Preview of Episode 8 from PAX/@comment-3146930-20130901212706/@comment-10390252-20130901213645

That's one of the things I'm waiting to see answered. My guess is that the Temple is part of an abandoned city (mabye one of the 'works of Man' that the Grimm brought to ruin before the discovery of Dust) and our eight heroes are going to have a running battle through the Grimm-infested ruins.

Cue lots of obvious comparisons to abandoned Numenorian and Dwarvish super-civilisation remains in LotR.