I was a living example of this on my trip to Japan. At first I only rode the subway everywhere... I knew which stops to get off at and which direction to go from there. Then I got a map and realized that I could walk to most of the places I wanted to go in about the same amount of time it took to take the subway, because I need not go out of my way being only able to follow preset limited transportation routes. Not to mention I got to see a lot more interesting places.
I used the subway when going back to the hotel from shopping, but to get to the electronics district in Osaka I tended to walk (unless the weather wasn't decent).
Before then I had no notion of the spatial relationship of the hotel to the various shops.