Series of shots of El Teniente copper mine, world's largest underground mine; POINT OF VIEW SHOTs of funicular climbing to pithead of mine (0:21). Shots of miners in galleries (3:04). Various shots of miners operating hammer drills (5:44). MS of head lamps of miners moving in dark (0:20). CSs of operator loading ore on car (1:11). CSs of minors eating and talking at bottom of mine (1:00).