Overview: Dan Walker and Helen Skelton complete their tour with a trip around the wonderful Yorkshire Wolds. The duo start by the coast in Filey before heading to the wildlife haven of Filey Dams Nature Reserve. Dan heads off the beaten track to meet historian Dr Emma Wells to reveal the mystery of the vanishing village at Wharram Percy. Helen turns engine driver as she ventures onto the tracks at the Yorkshire Wolds Heritage Railway. Then Helen and Dan reach their final destination - the modern marvel of the Humber Bridge.