A canyon connecting to a cliff. Light grey stone sides with darker coloring the further you look down. Plenty of walking space on each side, naturally formed. The two halves connected by white rope bridges, no "rails", blue ribbons on the sides of the also pure white planks. A silver turret or two settled the walkable area of the cliff, unloaded, unmanned. Occasionally a simple glider not too far from some seen in Avatar: tLA, in the same pure white and blue, also unmanned as far as I can tell, flies by, seen for a brief moment through the gap my mind has placed the camera. If there are people inhabiting this area they are most likely in unseen caves or in positions not shown.