The folks behind Human know a thing or two about aesthetics, having crafted an activity-tracking app for iOS that's quite lovely. The mobile software keeps tabs on walking, running, biking and vehicular motion with goal of racking up at least 30 minutes of physical activity per day. Now, the outfit has taken user data from 30 of the largest cities in the world and constructed visualizations for each locale. Maps for all three of the aforementioned endeavors are included, broken down by activity for further analysis. Don't take our word for it though, watch the cartographic motion take place for yourself after the break.