French philosopher Guy Debord talked about the idea of the dérive, a mode of travel where the journey itself is more important than the destination, where travelers “let themselves be drawn by the attractions of the terrain and the encounters they find there.” But to think of dérive as a kind of random stroll dominated by chance encounters would be to miss Debord’s essential point: spaces, by virtue of being inhabited or shaped by humankind, possess their own “psychogeographical contours, with constant currents, fixed points and vortexes that strongly discourage entry into or exit from certain zones.” Spaces can be…