The Parkland Walk follows the trackbed of the Alexandra Palace branch railway, closed in 1970, for four and a half miles from Finsbury Park to Highgate through the back gardens of Stroud Green, Crouch End, and Muswell Hill. For most of the route you're on an elevated platform looking over gardens and rooftops, with no roads and no street noise.
The spooky green man sculpture at the Crouch End spur is a destination in itself — a relief carving in an old railway bridge that locals have turned into a minor legend. From Highgate station you can either descend to the village or continue west along the edge of Hampstead Heath.