This photo was taken shortly after the 1906 earthquake. To get the same perspective, walk out to the end of the posts and look back in the direction from which you came. In the photograph, there are two cracks running along what is now a fairly flat road-like feature in the landscape. This is where the main active fault slipped during the 1906 earthquake. The cracks in the photograph are open. This means that there was not only lateral movement during the 1906 earthquake, but that the sides of the fault moved farther apart than they were before the quake. Since then, these cracks have filled in. Every time the ground ruptures, the sides of the fault will move farther apart and then fill in. This is why a flat area that resembles a roadbed can be seen. This feature is called a bench and is typically found along faults. Historically, these benches were often used as roadbeds.