> You don't need a map for that, just a sense of direction and distance. Without map you also need time. In some cases, a lot of it. Not all cities have perfec

> You don't need a map for that, just a sense of direction and distance. Without map you also need time. In some cases, a lot of it. Not all cities have perfect grid structure and there are one-way streets that can mess you up a lot. In the city where I live it would be really time consuming, because there's a huge pedestrian-only area in the center and many the streets around it are one way, or turning is prohibited at some crossroads so you cannot suddenly decide that you made a mistake and you want to make a U-turn and go back. Without maps you need time or luck.