I’ve long known about the way that the Hippocampus in London taxi cab drivers is always larger (up to 40% larger) than in regular people, because of the intense work they have to do to memorize the London street scene. The London Knowledge is apparently the most sophisticated and complex set of information about urban navigation in the world, with most would-be taxi cab drivers sitting for the examination no fewer than 12 times after almost three years of preparation.
But this is why Palace of Memory works, of course. If you build an artificial place in your memory that you navigate, then of course you’re hardwiring memories that you want to create artificially to the structure of a place which you’re navigating. It doesn’t matter that you’re not ACTUALLY navigating it; it only matters that you’re navigating. And that means that you’re making a neural map of imaginary places that contain data. You’re building a database that involves the left and right brains and the hippocampus in storing information. The key then becomes, what information do you want to store? And what imaginary map of imaginary places do you want to store it in?