Mapnificent lets you see how far you can get on public transportation in a set amont of time, in more than 60 metro areas worldwide. (Above: 15 minutes on bus and rail in Chicago.) It's a new way of visualizing how easy it is to navigate a city without a car. You can use it to check out places where you might want to live or visit, to get an idea of how far transportation will get you and how much of your day it might take up to get where you need to go.
Here's what 15 minutes looks like in a few more cities: