This is a film that was taken 4 days before the Earthquake in San Francisco in 1906.
This link has two films the one taken before the earthquake and the 60 Minutes story about the film.
I also found this footage that has sound. www.youtube.com/watch?v=8Q5Nur642BU
From the perspective of a walking advocate it is striking to see the people walking and streaming across the street and the vehicles are not so bothered by it.
It's a wonderful piece of history and of course tinged with sadness for the disaster and the lives lost.
I am an avid walker and hiker. My favorite is a long hike. I also enjoy taking off and going on a meandering walk for a few hours. I've hiked rim to rim in the Grand Canyon and I did 3 Burning Boot Walks on Vancouver Island.