Cargo Transit A
After descending the Emerald Canyon Commander Keen discovers a full scale Atroxian mining operation deep below the mountains. Keen can head straight into the Atroxian Mines, but he first has the option to enter Cargo Transit A.
This is the shipping center for the operation, used to transport material from the mines up to the surface of Planet Krisle. Being an industrial facility, Cargo Transit A is packed with crates of cargo and shipping machinery, including high-speed cargo transport devices known as Travelators. Dozens of Atroxites patrol the facility as well as a deadly electrified robot known as Axosis, and a few Spliders roam the caves above the shipping facility.
Cargo Transit A has two exits, one of which is much easier to reach than the other. The optional exit will lead Keen to discover a hidden message written in the Standard Galactic Alphabet, but either choice will simply exit Cargo Transit A. Keen will have to search elsewhere to find any secret places on Planet Krisle!
- Atroxian Realm - Page on this Wiki