Sylo Runner

I'll be publishing a novel soon and am thinking about the possibility of having a 2L "world" to go along with the novel, where fans can see the locations in the book. Do any of these already exist? How about for TV shows, movies, etc? I'm aware of copyright infringement issues that could complicate fans creating worlds from someone else's work, but if I create a 2L space from my work, would that still be an issue? I think this could be a great idea, but am not sure of the details. Hope someone can help.