We didn’t know before they started construction. Nobody used to pay attention to San Antonio shopping mall. It was just a residential place more than the shopping mall.
We used to go for the pumpkin patch or Christmas tree lot.
It was the huge empty parking lot with the side street had a sign “Silicon Valley”.
When construction people started building something. Everybody was guessing what it will be.
We knew what it will be but, exactly what kind of office, hotel, cinema.
The scientists and engineers who worked at 391 San Antonio Road in Mountain View, California, laid the technological and cultural foundations for today’s Silicon Valley.

http://www.computerhistory.org/events/upcoming/#celebrating-birthplace-silicon-valley