Fan of ER? This is the outside set of the hospital. The bags of trash are actually stuffed with newspaper, not smelly garbage, guess that keeps it from smelling. The bricks and cement siding are actually plastic. Because there are no rooms behind the windows, the lighting comes from outside the building in the form of giant spot lights that can be dimmed or brightened according to the time of day. Have you ever seen the emergency doors slide open? They'll pulled open by people (one on each side) not electricity. The emergency room is there, we went in and admired the fake foods in the vending machines.
I find all this stuff fascinating.