2. There's a life-size Yoda statue
First, it's important to remember that Yoda is small, so the life-size statue is, well, Yoda-size. Still: it's Yoda, one of the most renowned and powerful Jedi Masters in history, so... it's kind of a big deal that SF has its very own statue of him.
Yoda is located at the Southeast corner of the Letterman Digital Arts Center and can be a little hard to find, so if you visit when the campus is closed, you may have to, that's right: use the force. Or just look for Building B. But the former sounds like so much more fun.
(Pro tip: if you go during the day, you can also go inside the lobby where there's a life-size statue of Darth Vader that just so happens to be 6'6". Not that Yoda finds him at all intimidating.)