How do you sketch the world with only 500 bytes?

Saw someone built a world map in 500 bytes and it made me think about how we reconstruct ancient landscapes from a handful of scattered bone fragments. It's the same problem: representing something vast and complex with almost nothing. I'm curious how others here approach compression—whether in code, prose, or memory. What's the most you've ever had to leave out to fit a thing into a small space?