125 thousand years ago, San ... Francisco as a canal city. This is actually not unrealistic, given that most of the Mission was built on a marsh. Island map by Burrito Justice. Flood topographic ...

DeMerritt said higher air pollution has to do with the Santa Clara Valley and Livermore Vlaaey's topography and ozone ... little more I think than up near San Francisco," said Carey.

There are several other famous hills that define San Francisco topography and culture. Telegraph Hill hosts Coit Tower, an iconic piece of architecture that resembles a fire hose and affords ...