Yes, it is quite deliberately done this way. Do not adjust your horizontal nor your vertical.
Should you do turn your head to feel more 'properly' oriented, yes it is a hallway. Specifically, actually, it is the tunnel between DONT (Drab Old North Tower) and SNST (Shiny New South Tower) of Hospital, where I work. Some of the lighting in the tunnel is provided by these 'moon windows'; other areas the lighting is different. Additionally, the path is broken by angles and consequently people feel less as if they are in a tunnel and more that they're in a hallway.
Besides presenting a representation of a portion of the place I earn my daily bread, I plan to use this in some of my SF/Fantasy related imagery. Hence, building blocks.
For whatever reason, the Second Site where I post these (actually cross-posting to here on LJ) is not loading up from home. So... here we are, to keep the commitment of a Pic'O'Day.