Golden Gate Bridge is one of the largest and most spectacular suspension bridges in the world. It spans the Golden Gate, a strait at the entrance of San Francisco Bay. The bridge, which has a total length of 8,981 feet (2,737 meters), connects northern California to the peninsula of San Francisco. It contains about 88,000 tons (75,000 metric tons) of steel, 390,000 cubic yards (300,000 cubic meters) of concrete, and 160,000 miles (260,000 kilometers) of wire in its two main cables.