There is a semi-famous video from 1902 recording a ride on the then new Schwebebahn. MoMa digitised it and someone on Youtube did a side-by-side-recording of 1902 vs. 2015:
https://www.youtube.com/watch?v=7TqqdOcX4dc
There are two other suspended monorails in the Ruhr are, both driver-less and shorter, built in the 80s and 90s by Siemens, the H-Bahn at Dortmund University and the Skytrain at Düsseldorf Airport. I drove the H-Bahn daily, because computer science back then was distributed all about the campus. Still have fond memories about it. (Less so about the degree.) The Tim Traveller on Youtube recently did a video about it: