In March 2017, I published an animation to demonstrate the geographical difference between the abstract Berlin subway map and reality.
The animation went viral, reached #1 on Reddit World Wide (see the discussion here) and got reposted by the official Berlin media channels. After that, many users felt inspired to do similar animations for other transit systems. So a subreddit r/MapVsGeo was established to collect all the animations.
The input data I used for the creation: