Trivia thread -

[Ghoulish Delight]

Mr. gn2dlnd believes the plaques say "Class of '55" or something to that effect. If so, then all of their bases are covered. That includes Dumbo and Casey without questions. As for other attractions that were added in '55 after opening day...well, they are all gone. All that's left from '55 are either true opening day attractions or the almost-but-not-quite Dumbo and Casey.

Still doesn't account for the exclusion of Main Street Cinema and Golden Horseshoe (although it could be argued that it's the shows at the theater that are listed as attractions, not the theater itself. And the show, of course, is gone).