This place stopped being livable a decade ago.
The wires are frayed and bunched too close together, the steam pipes are cracked, the water pipes are rusted, the gas pipes are sealed with putty, the basal skeleton of the tower is too narrow to support all the building that's crept up its sides, and the conduits in this place are too much of a rat's maze for the maintenance crews to figure out where they are, half the time, let alone which ones they've checked. There are some places here which barely even see official maintenance any more.
Sometimes, when the wind gets bad and the ballast stations can't keep up, the whole structure begins to tilt. The bridges weft and bob, and you can hear the squash plates moaning, deep inside the tower's bones. It feels like the whole place is going to slide off its pilings and into the clouds below.
Caliguari's Watch, known as Caliguari's Drop by the residents, is the decrepit tail of the chain of towers known as Blackstoke City. Hundreds of feet above the mysterious and lethal ground beneath, Caliguari's Drop is one of the two sources of coal gas for the city, and contains a fairly extensive eel farm. Both of these industries are unpleasant and the tower itself is dangerous and ill-kept, and living in Caliguari's Drop is pretty much a sign that you have lucked out in Blackstoke. You are, as it were, at the bottom of the heap.
(As far as photomanipulations go, I have no idea what stock I used, I raided google image search for photos of power plants, warehouses, concrete, old buildings, older buildings, industrial gantry, and the space shuttle launch pad—the photos themselves have been chopped apart and stretched, and painted over so much that they are no longer recognizable as any of their component parts.)