We’ve seen endless studies that remind us of the importance of getting out into nature where we can relax. To most people, this advice makes sense. But others “might find lush trees, chirping birds, and blue skies anything but zen-like.” They might get more out of of quick walk on a crowded sidewalk. Here’s CityLab on the researchers trying to understand why some people find crowded cities relaxing — and others don’t. (As of yesterday, I have five pets. I go on walks to get away from nature.)