Just know that while Cornell is gorgeous it is freezing most of the school year (and gray) making it very difficult to do stuff outside. Yes the late spring and summer are beautiful however.
With regard to Berkeley - there is actually a lot of beautiful outdoor space right near by. I would specifically recommend hiking in Tilden Park in the Berkeley hills and also hiking in Redwood Regional Park in Oakland (the French Trail is astounding).
I would also look at Cal Poly or UCSB.