The 2000 census listed the population of Sunnyvale as 132,000 of which fully 40% were foreign-born. In comparison, California's foreign-born fraction is 26%. For the entire United States, this percentage is about 20%. This influx shows itself all along El Camino Real (Spanish for 'The King's Road'), the road that runs through Sunnyvale's heart in its journey through the entire length of California. Ethnic restaurants abound. In addition, there are 'speciality' stores for groceries and clothes and even electronics which sell converters from the 110V in use in the United States to the 230V more common in India and the rest of Asia. Diversity is a lot of fun and manifests itself in unusual ways - at the local barbershop, I have gotten haircuts from the Spaniard owner, a Japanese grandmother, an Iranian refugee, a Hispanic immigrant and an assortment of women from South Asia - Vietman, the Phillipines etc. In comparison, in my hometown in India, for nearly 20 years, my hair was cut in the same barbershop first by the owner and then by his sons.
Any friction with the influx of so many nationalities is practically absent on the surface. However, a recent initiative by Indian Americans to rename Persian Drive to Mandir Drive (Mandir means Temple in Hindi) erupted into one of sleepy suburbian Sunnyvale's rare city hall crises. Locals objected to the name change, Iranians who were especially sensitive after Sept 11th objected as well as did some businesses and long-time residents along Persian Drive who did not want to reprint stationery. Evidently surprised by the strength of the opposition - renaming streets and districts and entire cities in India after local, state or national heroes is now routine - the initiative was quickly withdrawn after an acrimonious meeting lasted past midnight in city hall.
Tourism-wise, there is precious little in Sunnyvale and the two most frequently listed spots are the Lace Museum and the Sunnyvale History Museum, both on Murphy Avenue. I myself haven't visited either.
However, you don't live in a place for five years without learning some of its secrets and here are some of the spots to visit in Sunnyvale if you happen to be visiting:
Sunnyvale in the vicinity of San Francisco and Santa Cruz