Dreams and the architecture of dreams are the subjects of Inception
, and it's to Nolan's considerable credit that he builds the movie's dream worlds with the care and intricacy of an architect. No surprise, then, that buildings and cityscapes feature prominently: as Ariadne designs her initial dream landscapes, cities fold themselves at right angles, stairways in corporate buildings fold onto themselves in an infinite loop (calling to mind M.C. Escher's painting "Ascending and Descending"), and two mirror cast reflections that create additional streets (reminiscent of passages in Jorge Luis Borges's story "Tlön, Uqbar, Orbis Tertius"). No surprise, either, that Nolan's spends so much time taking the viewer on a tour of dream worlds and their logic that the viewer begins to worry that Nolan has not bothered to populate his own dream with interesting characters, thus dampening the viewer's involvement with Inception's story.