It opens on that rooftop, against the oddly shaped chimneys. He is there. Walks to the low parapet. Looks out toward a city that never resolves. A framegrab on what he sees would reveal only a faint arrangement of vertical and horizontal lines. No focus. Definitely a skyline but not enough information to provide any sort of identification. Rule out Manhattan, others; there are lists arguing the places it cannot, might not be.