I hear the clacking from underneath the streets. It is the sound of a cable as it moves up and down the street. Underneath many of the street in San Francisco large cables are circulating. The cable cars will grab onto them to move forward and release and brake to stop. Turning around at the end of the route requires people to physically move the car around and head it back where it came from. These cable cars are not just for tourists, residents use them for commutes to work and other sections of the city.
