Fun things to do in San Jose?

I’ve lived in San Francisco for 9 years but I’ve never been to San Jose. There’s so much to do in San Francisco I’ve just never had the chance to explore this other big city that’s only an hour away. I’m curious to see what San Jose has to offer. I’ve heard they have a really great flea market, and an art museum, but other than that I don’t know much about it. Anyone have recommendations for other San Jose activities, restaurants, hikes nearby? Thanks!