The Parkland Walk is a linear green walkway, in the London Boroughs of Haringey and Islington, which follows the course of the railway line which used to run between Finsbury Park through Stroud Green, Crouch End, Highgate and Muswell Hill to Alexandra Palace. It is a local nature reserve and a Site of Metropolitan Importance for Nature Conservation. It was declared a local nature reserve in 1990 and is London's longest such reserve.The walk is almost all in Haringey, but a short stretch between Crouch Hill and Crouch End Hill is in Islington. The route follows the bridges and cuttings of the line, but avoids the closed surface section of Highgate station and its adjoining tunnels, which are closed to walkers for safety reasons. Between Finsbury Park and Highgate, the path forms part of the Capital Ring strategic walking route.HistoryThe route of the path between Finsbury Park and Highgate was originally constructed by the Edgware, Highgate and London Railway in the 1860s as part of its railway line from Finsbury Park station to Edgware station. Before the line was opened on 22 August 1867, it was purchased by the larger Great Northern Railway (GNR). A branch line from Highgate to Alexandra Palace opened on 22 May 1872. The GNR became part of the London & North Eastern Railway (LNER) in 1923.