Everyone is gone by this late hour. The computer monitors, switched to power saving mode, emit a faint glow that is invisible to the human eyes. The parking lot is almost empty except for one or two cars whose owners might be pulling an all nighter in their offices. Or could they be wandering in the mostly deserted building, like me? For many nights I returned to the place where I worked during the day, retraced the paths of my commute, wandered through parking lots, train stations, and searched for hints in the urban landscape that might explain the sense of boredom that permeates everywhere in our contemporary existence.