Some code’s like an office building on a skateboard. Or a car launched from a catapult. And sometimes like you’ve wandered into a dark basement with too many cats, some strapped to land-mines.
When you’ve read a lot of code and designed and team-written a bunch of systems you get good at reading code and transferring it into a picture. Bits of code have strong characteristics. A system and the code behind it becomes like a landscape.