They must have vast mines somewhere outside the city. These buildings do look like they'd be tiring to try and walk all the way up. Though the view from the top must definitely be something! That's not a bad idea actually, might help in getting bearings. Though the lights do seem to block out most of the stars at night, which is sad.
It's hard to understand how these people go about their lives like this. But since it seems we're stuck here, we need to adapt to it. Still, I prefer traveling by horse and a bit less noise.