City of Greyhawk Outer Wall and Gate
Sorry for the rough map, but I'm terrible at drawing.
This seems to match the City of Greyhawk outer wall description from the City of Hawks novel.
"A double wall encircled the city. All of Greyhawk - Old City, the larger area called New Town and the Citadel too were within it. The outer curtain was some twenty-five feet high. This wall splayed out at the base where it met a ditch, or moat, or some other watercourse, and was topped with serried merlons and crenels to protect defenders in time of war.
Between the outer and inner walls was a relatively level sward a hundred or more feet broad. The outside edge of this strip of grass was level with the battlements that topped the outer wall. The crowning stone of the inner wall was much higher. The city had been built on a large hill - not especially high, but large in area. Those on the sward between the walls could look upward forty feet to where machicolated battlements stood topping the massively thick curtains of the inner wall. At intervals there were bastions on the outer wall, and matching them on the inside were tall towers.
Wherevere the walls were pierced by gates, the sward was broken. Every way that led into the city resembled a road at the bottom of a canyon. Travelers from the outside would pass through a gatehouse first, then a long passage, open above, but flanked by walls on either hand; then a tunnel that bored through another, bigger tower."
This is a very crude depiction of the outer wall. I intend to crudely draw out the various streets and buildings as well as add detail of interiors while trying to keep them faithful to the available information provided for the city.