The San Francisco Ferry Building is a landmark along the Embarcadero. There is a Marketplace on the ground level and office spaces on upper levels. Above the building is a 245-foot tall clock tower with four clock dials of 22-foot diameter. It is the largest wind-up, mechanical dial clock in the world, although the hands are now powered by electric motors. There is a also heritage street car station located on the pedestrian plaza in front of the building.