Foothill College Observatory, Los Altos Hills, is open to the public Fri & Sat:
https://foothill.edu/astronomy/observatory.html
They also have occasional events and lectures. It hasn't changed much since I was a docent in 1976.
They also have occasional events and lectures. It hasn't changed much since I was a docent in 1976.
Not really on the way but close enough is Bale Grist Mill State Historic Park which has a gold rush era grist mill.