Zoom in on the wikimedia commons high-res one (thanks for that high res link!), and then look at the balconies in the middle column of the building. See the doo

Zoom in on the wikimedia commons high-res one (thanks for that high res link!), and then look at the balconies in the middle column of the building. See the door in the balcony? Each of those four-window blocks is two stories high. Which means each "pane" is pretty big -- others have said each of those four-window blocks is actually four hotel rooms. The picture in the OP didn't make it totally clear, which left me wondering too, although I figured that's what they meant so it must be that way -- the fact that we have to look so carefully to verify it, I guess shows the success of the "illusion"!