I absolutely love websites like this that have a ton of information about a very niche topic. No ads or monetization, just someone who put together a very detailed website about something they love.
I think my first encounter with a website like this was for the movie Donnie Darko, which I found after I first watched the movie and was trying to understand the story. The website is still up! [0]
If anyone has examples of similar websites, I would absolutely love to read them.