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 and M20, call at Sheffield en route to London from Newcastle upon Tyne and Inverness respectively. The Sheffield and South Yorkshire Navigation (S&SY) is a system of navigable inland waterways (canals and canalised rivers) in Yorkshire and Lincolnshire. Chiefly based on the River Don, it runs for a length of and has 29 locks. It connects Sheffield, Rotherham and Doncaster with the River Trent at Keadby and (via the New Junction Canal) the Aire and Calder Navigation. Following the closure of Sheffield City Airport in 2008, the closest international airport to Sheffield is Doncaster Sheffield Airport which is located from