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Arduous travels - with hope, faith, and some reward - around the world. Pascale Harter introduces dispatches from four correspondents pursuing their aims despite the obstacles: Matthew Price walks alongside the families trudging the migrant trail through Hungary to Austria and Germany; Rajan Dattar struggles to stay on the way to enlightenment at a Thai monastery; Hugh Schofield wrestles with the decay of France's decrepit plumbing and Christine Finn finds unexpected delights and consolations on the slow, quirky Amtrak train network in the USA.

Photo: A family of migrants walk through rain and low temperatures as they make their way to Hungary from Serbia near the town of Kanjiza on September 10, 2015. (Christopher Furlong/Getty Images)