Now this is a rabbit hole! There are far more of these than I'd thought, ranging in structure from blog-like to database-like, with some updated by the host and

Now this is a rabbit hole! There are far more of these than I'd thought, ranging in structure from blog-like to database-like, with some updated by the host and some allowing user contributions (with some of the latter using wiki software). Many also include television, games, comics, or other media; and databases for those forms of media in particular also exist. More mundane subjects, like locations and songs used, are each covered by several sites. To keep the scope narrow, here are some more interesting ones that include films: Camera equipment used: https://shotonwhat.com/ https://shotonwhat.com/ Instances of censorship: https://www.movie-censorship.com/ https://www.movie-censorship.com/ and in Australia in particular: https://refused-classification.com/default.html https://refused-classification.com/default.html Keeping with the theme of transportation from the other comments: - The Boat Database is small and Fandom-hosted: https://imbd.fandom.com/wiki/Category:Movies https://imbd.fandom.com/wiki/Category:Movies - There's one for trains, but only for the UK: http://railwaymoviedatabase.com/ http://railwaymoviedatabase.com/ Ultimately, it seems that we are devoid of an Internet Internet Database Database. Wikipedia comes close with some of its lists and categories, but only includes those it considers notable. Some of the databases do link to each other; e.g., the Cars Database has a directory page featuring smaller databases such as those for busses; LEGO and similar brick systems; and Microsoft and Nokia: https://www.imcdb.org/links.php https://www.imcdb.org/links.php