Discover the beauty of the South Pennines with the Explorer OL21, a detailed map from Ordnance Survey which allows you to explore the Pennines in all its glory. This essential map covers Burnley, Hebdem Bridge, Todmorden and Keighley.FeaturesDetailed and informative explorer map of South Pennines from Ordnance SurveyCovers Burnley, Hebdem Bridge, Todmorden and KeighleyScale: 1:25000Now includes Mobile DownloadRecommended activity - walking / hiking / cycling / navigation / expedition