Well, I jumped on the bandwagon and built a entry for the CCCX Miscellaneous Category.
Added Play-ability features are twin LED lights in the bottom chamber that can be turned on/off by the lever on the side.
Its the secret residence of Hayden. Lord of the Eastern Dunes. Built under the harsh sands of Loreos to protect noblemen and their troops should an superior force should attack.
Not designed as a fortress but more like the dungeons of a castle.