I saw some of those in Berlin. I think they had been replaced with underground pipes, but they kept some and decorated them like modern art. It’s in the same area as the Berlin Wall museum, with parts of the old wall still standing.I was always laughing at the aesthetics of small towns in my motherland, imagine the whole town decorated with such pipelines, and they are always yellow. But now I am asking myself, perhaps it make sense, if safer and easier accessible?