The entertainment center of San Francisco is Union Square. It was built as a public park in 1850.
The main offices of several major companies, such as Google, Mozilla Foundation, VeriSign, Microsoft divisions, Intuit Inc., SGI and others are located in Mountain view.
Stanford University has 14 Nobel Prize winners, 194 members of the American Academy of Arts and Sciences
Y Combinator is an American seed accelerator, started in March 2005. Fast Company has called YC “the world’s most powerful start-up incubator”.