David Friedman sees the landscapes of human habitation as necessarily fragmented—a leafy residential neighborhood down the road from a heavily electrified strip mall, a concrete airfield next to a tidal marsh—so it is no surprise that urban parks also lack the organic continuity of “undisturbed” nature. Land was taken for the parks where it was available and adapted to the uses of an urban population, often with considerable violence to its former state. In that process, some areas proved less tractable than others and these spaces were often left outside the itineraries planned for good citizens seeking the refreshment of easily accessible nature. Unimproved and untended, these spaces provide the setting for the unauthorized activities whose traces are the subject of these photographs.