I just ran across this at Primetimer:
"An Instagram Account Focuses on Scooby-Doo's Background Art -- and the Destruction of America’s Victorian Heritage"
Thanks for the post. I enjoyed the perspective-- and I've always thought that early Scooby, in particular, featured some impressive atmospheric background art, a primer for clichéd horror settings.
I kind of remember a similar site on a different service (Tumblr, maybe?) going around a few years ago. I wonder if it's from the same people?