San Fran's Chinatown is the oldest and biggest in the US.
Here's a link to my story for Seattle's Child: family-friendly adventures in San Francisco.
Brought back so many memories. When I was 22, I spent a summer interning in San Jose and most weekends, I'd take the train to SF and spend the day walking through the city. More often than not, I'd wind up in Chinatown, gawking like a tourist. That's when I knew I'd have to move to the West Coast. Lemme tell you growing up Asian on the East Coast was not the funnest. My Seattle-born children were not impressed by Chinatown, but it is still where I feel most at home.