Upside-down "flying" train linebr one of the world's most unusual transport systemsbr The Wuppertal Schwebebahn, as it’s called, is 13.3 kilometres long, and is a regular means of getting from A to B and carries 82,000 people daily.br The German city of Wuppertal is home to one of the world's most unusual transport systems - an upside-down "flying" train line.br Carriages hang upside-down from the tracks and drive over the streets and river of the city.