I'm as big a fan of New York's food carts as they come; right now, I'm particularly fond of a nice little cart at 53rd and Park where, for $3 or $4, you can get the most pungently delicious apple-carrot-celery-ginger juice in the five boroughs. Walking home today, near Northern Boulevard, I saw these two unadorned carts on the side of the street: such interesting structures, inside and out, even before cuisine and culture come into play.