The High Line in New York city is an urban renewal project that has turned an old elevated railway line into an urban green corridor in Manhattan. I take a walk through the High Line examining the new perspectives it affords, and relates urban and environmental notions of renewal with questions of agency and appropriation. Along the way, the peculiar characteristics of the High Line highlight normally hidden features of the urban landscape; these revelations prompt questions on how the uses of the High Line might diverge from the original architectural vision, and suggest that it be also seen as a platform for renewal, and not just an outcome. A broader view invites speculations on new forms of commons. In an age where civic action is both so difficult and so necessary, a walk through the High Line suggests ways of approaching systemic change laterally.