The San Francisco Cable Car System is a historic transportation system that operates on the hilly streets of San Francisco, California. Established in 1873, it is the only manually operated cable car system in the world. The cable cars are powered by a continuously moving cable beneath the street, allowing them to climb steep inclines and navigate the city's unique topography. Today, the cable car system is a popular tourist attraction and a vital part of the city's public transit network. It consists of three lines: the Powell-Hyde, Powell-Mason, and California Street lines, providing scenic views of the city and its landmarks.