Subterranean Geometry

I descended the long concrete ramp into the pedestrian underpass, stepping out of the morning wind into complete structural stillness. The corridor formed an austere subterranean canyon of exposed ribbed concrete, illuminated by an unbroken row of overhead recessed luminaires converging toward a distant vanishing point. Pausing at the center of the first floor expansion joint, I struck the heel of my boot firmly against the cold screed. The sharp acoustic pulse propagated straight down the shaft, reflecting off the opposite portal eighty paces ahead without erratic resonance or surface distortion. In this silence, the geometry of the passage remains absolute. #YoRHa2B