IRONBRIDGE, UNITED KINGDOM - DECEMBER 22: Heavy snow fall covers the Ironbridge World Heritage Site on December 22, 2010 in Ironbridge, United Kingdom. The world's first cast iron bridge was built over the River Severn at Coalbrookdale in 1779. Britain's airlines, roads and railways are beginning to recover as they work through a backlog of passengers and blocked roads, although localised snowfall continues to fall (Photo by Christopher Furlong/Getty Images)