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A walk in the park needn't be too meandering
(lemmynsfw.com)
Desire paths Desire paths can be paths created as a consequence of erosion caused by human or animal foot-fall or traffic. The paths usually represent the shortest or most easily navigated routes between origins and destinations. https://en.wikipedia.org/wiki/Desire_path
I've never seen this in parks myself, but perhaps it's something like this?