Ask HN: Where to go in Silicon Valley

Hi, long time lurker here. Our Taiwan-based startup is going to LA for Red Herring Global 100 contest, and I plan on visiting Silicon Valley for a few days while I'm there. Any tips on where to go and what to see to get to know the startup culture there?

Already got some connections to go to see 500 startups, Apple, and a few other companies there. I'd appreciate any suggestions or intros to awesome places.