An interesting attraction to explore in San Francisco. San Francisco Chinatown is the oldest one in Northern American and also the biggest one outside of Asia.
For the building itself, it may not be something very extraordinary architecture but it has subtly exotic atmosphere that is really hard to be created and to be copied. The Chinatown is based on the traditional chinese style mixes with western elements, the way they built the entrance of the Chinatown is exactly like the way they built the temple and once you walk in the chinatown you can see the western elements including the buildings and the sign.
It is an really interesting place where you can understand part of the chinese culture through walking around here, it also a great place for those people who are craving for a real chinese cuisine especially for cantonese restaurants.
Besides, you can get chinese medicines from some vendor like herbs, spices and traditional recipes. Chinese medicines are not going to hurt your body because they use things from the nature but it takes longer time to cure.