My mental model of Tokyo changed a lot when rental scooters became available. Especially traveling East-West, there are a lot of places much closer together than you'd think from the subway maps.
Especially in areas where a lot of subway lines get close together, subway maps often expand the area so you can be better see the stations/relationship between the lines. I tended to mostly take the subway into Boston as an undergrad and generally only walked in a fairly small area of the city. I remember once doing multiple line changes and realizing afterwards that my destination was about 3 blocks from where I started.
