Lower tunnels
The Grit Gate lower tunnels extend from strata 1 through 19, where they are cut off by subterranean caves. Each stratum is more or less the same – an expanse demarcated by  fulcrete walls, cut from
fulcrete walls, cut from  sandstone.
sandstone.
Each zone has a tendency to have some number of  chests, as well as smaller rooms sealed by
chests, as well as smaller rooms sealed by  security doors, frequently with missing chunks of wall. Often, there is a room filled with
security doors, frequently with missing chunks of wall. Often, there is a room filled with  trash and/or scrap. Occasionally, a room is guarded by
trash and/or scrap. Occasionally, a room is guarded by  rifle turrets or even
rifle turrets or even  chaingun turrets.
chaingun turrets.