Carnous is the famous Boardwalk city, built upon the toxic lands of The Wastes. Here the land is slowly corrosive to the touch, causing illness with prolonged contact. The bubbling sulfur and ectomass pools (HellPits too) are especially lovely, if you have the right aesthetic. The soil is soft and any heavy object slowly sinks. If it was not for the special resources here (dyes, alchemical elements, resins, Grimrock, Verner glands, etc), it would be a place that no one would come.
Carnous is a wooden city that is never stationary. All the buildings are wooden, built upon wooden platforms. They are usually one story, but there are a few two story buildings. There are boardwalks and bridges (wood and pitched ropes) that connect the various platforms. The longer the platform is in contact, the more likely it is to fall apart. Thus the older parts of the city are not that old, as the truly old part have collapsed into the soft soil, first being rubble, then a green globby mass. The City Pilot, the head councilman, keeps plotting a new course… where new buildings/ platforms are built in that direction.
The local woods are blond in color, quite flexible and light. (Local is an approximate, all good wood is from the edges of the toxic lands). In the end, all buildings here are temporary. Though you would never know that given the craftsmenship invested in them. Door frames, Frame beams, and Roof Trims are intricately carved. Various clans in the city have their own distinctive patterns, so you can tell ownership of the building (or at least who built it) by carefully looking at the patterns carved in. Interior walls and some exterior ones (for less secure buildings) are made of thick lacquer paper to save upon weight. The presence of these translucent walls helps "light up" the city at night. One would think fire would be a constant danger here, but the resins used to preserve the wood from the corrosion help to make it fairly fire resistant.
There are airship docks and Verner/ Giant Wormish pens spread along the edges of the city. These are the only safe entrance and exit ports for the city. Walking or riding a normal beast is not an option here. In fact, the cry "Soul Overboard" will galvanize every native to action, gathering ropes and vaulting on poles out to the person in an attempt to save them before the soil claims them.