TIL the growing German city of Wuppertal needed a railway, but had nowhere to put it. A regular monorail was deemed unsuitable, and an experimental "Floating Monorail" system was selected and constructed through the city and above the river, and remains in popular use today after over 115 years.

TIL the growing German city of Wuppertal needed a railway, but had nowhere to put it. A regular monorail was deemed unsuitable, and an experimental