Everything is stone, and stone of the heaviest--floors, stairways, mantels, benches--everything.

The walls are four to five feet thick.

The streets generally are four or five to eight feet wide and as crooked as a corkscrew.

You go along one of these gloomy cracks, and look up and behold the sky like a mere ribbon of light, far above your head, where the tops of the tall houses on either side of the street bend almost together.

You feel as if you were at the bottom of some tremendous abyss, with all the world far above you.