https://silentlocations.wordpress.com/2018/06/26/new-buster-keaton-self-guided-tours/
You can download an updated color illustrated Hollywood walking tour, where Keaton made eight different movies, here
https://silentlocations.files.wordpress.com/2018/06/hollywoods-silent-echoes-cahuenga-tour-2018.pdf
and if you're a glutton for punishment, can watch a neatly edited YouTube video of one of the studio tours here
https://youtu.be/kr5mFWWXZjA?t=1s

Cheers, John