Thanks for the response and article. I can only imagine how difficult that would be.

I'm not sure if you've heard of it, but there is a memorization technique called "Art of Memory" you can read about here: https://en.wikipedia.org/wiki/Art_of_memory. I think you'll find it particularly interesting since it explains how to process/form mental images in a very thorough & systematic way. It's all about enhancing memory by thinking about information in a visually, and contains examples of how to visualize different types of information.