Picture of the Tanfield Railway which opened in 1725 and is the world's oldest operating railway. Its was constructed to take coal from Stanley and Marley Hill to the River Tyne. Originally horses hauled small wagons along a wooden track. They were replaced in the 19th century by metal rails and locomotives. The line closed in 1962 but is now run by a private company assisted by enthusiastic volunteers. The Marley Hill engine shed is also the oldest working engine shed in Britain.