Such a good a channel. With enough travel (or geoguessr it seems) you start to subconsciously notice themes that connect regions; the height of gutters, colour of soil, patterns of street pavers. It gets stored away without us noticing it, until one day something triggers it. I think it's innate, serving an important, though often under-utilised function. The game taps into that so well that his content was bound to be interesting, even without his easy charm.