I have been on the factory tour twice.
First time was June of 2014, just before the re-organization of the production line.
They had a lot of areas of the factory which had not been renovated since it was the NUMMI plant, and those areas had huge areas with stored product in it.
And we visited some areas of production.
The factory tour a couple of weeks ago was three times better.
They have the same five prototype cars there, just moved around a bit.
Much more of the factory formerly storing materials was now manufacturing cars: Model S and Model X, left-hand drive and right-hand drive one after another.
Tour take right at an hour.
There were people on our tour from Norway, Switzerland, Germany, England, Australia, even a lady who drove her car from Dallas (we had flown in, were in a rental car).
Most of them were there for TMC Connect and the Gigafactory opening.
So much to do and see in Northern California, it is unlike any place in the world.
You can go into SF and explore the Bay including Alcatraz, head West to Monterrey Bay and Point Lobos maybe Silicone Valley and Palo Alto, head North to wine country and Muir Woods, head East to Yosemite and South Lake Tahoe or South to Cambria and Hearst Castle and mid Coast California Big Sur.
You will run out of time (and money) before you run out of things to see and do in California.