An open-air rooftop gym transforms salvage into function: rusted steel decking, scaffold frames, cracked plaster, and creeping vines. A bench press with cast-iron plates and a stationary bike built from machine parts sit on black rubber mats; a pallet with a propped car hood creates a lift base. Broken roof panels stream sunset light and lanterns glow amber, shaping a gritty, post-apocalyptic training zone.