Just pass the plastic drapes you walk through upon entering the main level, and you will notice a talk directory of the various shops here on Cydonia as well to help you get your barrings! Just past the Broken Spear will be a ramp that will take you into the Central hub area of the city, where a majority of your shops will be located, along with elevators and stairways that will take you lower down onto level 1 and the mining areas of level 2. Even though it may be small, there are still a few areas for you to explore and find some quests in!
The “surface level” only extends out to the top of the large ramp underneath the “Hours without incident” sign hanging above. The Surface Level of Cydonia is incredibly small and resides just inside of the main airlock from the outside Martian surface. Sol is located (when looking at the starmap) northwest of Alpha Centauri, where New Atlantis and the Lodge are located. You can find Cydonia located on Mars within the Sol sector. Getting around is pretty easy with three main methods to reach the various levels: the elevator, the stairs, or going through the Luxe Condominiums (for the central hub and residential sectors at least).
