Day and Night

"Human societies all have what is called in theatrical parlance, a third lower floor. The social soil is everywhere undermined, sometimes for good, sometimes for evil." - Victor Hugo, "Les Miserables"

Enjolras and Montparnasse, the upper and lower strata of the underground, day and night.

I'll replace this image with a better photograph when I can work out how to do that (any ideas? there's some touches of metallic paint, so there will be some glare).