Can lots be merely changed from residential to museums?
Living Museums are interesting. Plimoth Plantation is gone, but that was a great living museum. There were families that worked there for generations and their children grew up on the site dressed in historical clothing and living in the houses during the day. I have sometimes wondered what some of those children thought when they were young.
Maybe you could leave some lots untouched, but in your head think of them as part of a large living museum.
You could make holidays that required visiting them as if they were museums? Plimoth Plantation was packed at Thanksgiving. A nearby railroad museum was packed at Christmas.