Geography of Sheffield (Totley Brook passes south of Totley and meets Old Hay Brook at Needham's Dyke). The Sheaf flows northwards to join the River Don near Blonk Street Bridge in the city centre. This lower section of the River Sheaf together with the River Don, between the present Blonk Street and Lady's Bridge, formed part of the perimeter of Sheffield Castle. Porter Brook's source is just inside the Peak District National Park, to the west of the city, at Clough Hollow, also near Ringinglow. From here it flows eastward to meet the Sheaf, at a point now located underneath Sheffield Midland Station.
Sheffield City Centre run through the city centre, the Cathedral Square stop forming a focal point for operations. National Express coaches serve Sheffield city centre direct through the Sheffield Interchange. The 560/564 service connects directly to London Victoria Coach Station (only occasionally stopping at Chesterfield and Milton Keynes en route). Numerous other services connect Sheffield to destinations across the UK and all of them depart/arrive at Sheffield Interchange. Sheffield city centre is home to the Sheffield Interchange. In recent years it has lost importance as SYPTE have constructed several ‘mini-interchanges’ around the city centre to accommodate shopping and other activities the areas for