Re: The Golden Gate
The central structure of the bridge is immense, and the cable bundles are almost indestructible. The central pylons at sea level are protected by concrete barriers designed to stop a runaway ship.
However, the North Approach Viaduct is a normal trusswork support, strong, and resistant to earthquakes, but subject to collapse if hit with enough explosive. The bridge itself would be intact, but the roadway leading to it would be down, maybe for months. Very disruptive.
An interesting article on recent work to reinforce the bridge against earthquakes can be found here.