I tweeted this a while ago, but I thought I’d mention it here in more depth. Castle Peak and Thunder Railroad is a G-scale railroad layout containing several iconic Disneyland attractions. It was built by architect David Sheegog and he occasionally holds open house tours so you can see it in person.
The whole thing is like a Disney maniac’s dream playground/backyard. There are several photos on the website, so go check it out and drool!