A children's playground built on top of the arched translucent roof structure of a traditional Korean covered market, photographed on a bright Saturday afternoon. A flat steel deck laid over the roof trusses holds a sandpit, a short slide, swings and a climbing net, all fenced with tall green safety mesh. A glass-walled stair tower rises from the market aisle below, where shoppers and food stalls are visible through skylights. Parents with shopping bags watch from a bench. Beyond the fence, low rooftops of an old neighbourhood. All signboards are blank, no lettering anywhere.