Eyewitness: Ribblehead viaduct, Yorkshire Dales | World news | The Guardian http://www.guardian.co.uk/world/picture/2012/jul/05/1#
Ribblehead Viaduct - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Ribblehead_Viaduct
Yorkshire Dales - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Yorkshire_Dales
約克郡谷地 - 维基百科，自由的百科全书 http://zh.wikipedia.org/wiki/%E7%BA%A6%E5%85%8B%E9%83%A1%E8%B0%B7%E5%9C%B0
