The Nilgiri Railways is a ‘UNESCO World Heritage Site’. It was declared in July 2005 as an extension of the Darjeeling Himalayan Railway. It covers a distance of 45 kilometres (26 mi) in 4 hours, 50 minutes and has 208 curves, 16 tunnels and 250 bridges. To preserve the ‘World Heritage Site’ status of the railway it still issues Edmondson style manual tickets for the Ooty-Mettupalayam journey. It was featured in a historical documentary by the BBC in February 2010.