Runners want water and parks

The big takeaway, Yau says, is that the most running is happening by water and in park areas. That's especially true in Yau's map of London (pictured above) where the routes are centralized around the the banks of the River Thames and through the nearby St. Jame's Park. It's a similar story in New York, which is split up between Central Park and Lower Manhattan. Yau notes that all this isn't just eye candy, and could actually be useful for city planners when they're making decisions about where to put new infrastructure.