San Rafael began flourishing as a city in the mid 1800's. The late 1800's attracted a lot of new residents, and many Victorian houses from that era have remained. Here in California, we think this is old.
This Victorian house is now the Marin County Museum. The museum is small but does offer some tidbits of information.
Here is a link to the Marin County Travel & Tourism page:
There are some very good tips there!
Pictured here is the Nicasio school house, in West Marin. Picture from marin.org.
Favorite thing: San Rafael is in Marin County -- this map gives you an idea of where the county is in relation to San Francisco.