I’ve written of my fondness for fan-made blueprints of Star Trek ships (and other sci-fi vehicles).
I also enjoy baseball park architecture, and pictures of the old parks that I watched on TV when I was a Red Sox fan as a kid. There are a bunch of good sites, like this one.
But one fan has gone above and beyond, creating elaborate 3-D models inside and outside three classic parks: Comiskey Park, Crosley Field and League Park. Check out https://bandboxballparks.com.
Well done, sir!