Solid.
"Body must be at least 30 characters; you entered 6." [Even if it is stupid to do so. And even if it detracts from the answer. I guess.]"
OK. I answered the question directly. The city should look solid. Need more? Solid buildings: made of lots of steel and concrete. Solid people: fat, blubber gut, dun-laps, roll-overs, politically correct (so called "healthy") tubs of lard. Solid transportation: heavy steel construction that follow rails to which their wheels follow grooved tracks on each side of the rail making them extremely difficult to dislodge. The editor wanted more. I gave more. But my answer is still "Solid." The city looks solid.