Perhaps not as famous as the Golden Gate Bridge that connects the city with Marin County to the north, the double-decker San Francisco-Oakland Bay Bridge is no less impressive than its more illustrious cousin as an engineering feat. A breathtaking sight, its complex system of steel cable spun onto the bridge's spans like a spider's web spun along its length. The bridge makes an especially captivating spectacle at night when miles of lights outline its graceful body. Another, even more impressive, achievement in the course of its history was when it was repaired and reopened within a month after a part of the span tumbled as a result of the 1989 Loma Prieta Earthquake. The bridge underwent a seismic renovation in 2013, adding a brand new single-deck span east of Treasure Island.