Sub-level:
The group ignores the first door and follows the track down the corridor. Your footsteps echo off the duracrete, and the intermittent puddles and damp walls give the cool air a raw, humid quality. You come to a T-junction. The droid track on the ground turns to the left and you can see the corridor slopes upwards out of sight about a hundred feet away. To your right another corridor beckons, and it turns to the right about 50’ away.