It's hard enough to park a car or even just walk on the especially crazy-steep SF streets, to imagine building a house on them would seem impossible if they weren't already there. Photographing those nearly-vertical parts of town, but tilting the camera to align the bottom of the frame with the street instead of the buildings, you get a crazy, fun-house look at just how off-kilter construction has to get to deal with the topography of this city.

Photos by Dan Ng, Andrew Tomayko, and David Parmo