It's similar to this one. A basement type. It wasn't far underground... the entrance was right outside, and led pretty much under the building like a cellar.

[ Looking at what crystals they have, turning over a bottle or two to look at its label. ]

Had its own secret cellar though, with guns and a map and notes. Turns out it was being used as a base for the NLU, a resistance group involved with the war and all. Just so happened one of the other people stuck with us was a member herself, had a handful of things to say.