The Swiss town of Vevey has staged a once-in-a-generation celebration of its winemakers, with fancy dress, alpine horns, cows and dancers kicking off a festival that dates back to the 18th century. The three-week Fête des Vignerons, which began in 1797, is held roughly every 20 years and on Thursday 5,500 locals donned costumes, wigs and makeup to take part in the gala opening.