Wayfinding looks like signage. It isn't. Beneath every visible sign, screen and pictogram sits an older system — the human brain reading space, building mental maps and making split-second decisions about where to go next. Get the psychology right and the signage becomes almost incidental. Get it wrong and no amount of design can rescue the experience. This article unpacks the cognitive science behind navigation, and why the best destinations in Asia are now being designed brain-first.