Sloane square metro station in the 1920s with the river Westbourne flowing through a metal culvert halfway up the station.
https://cdn.masto.host/sigmoidsocial/media_attachments/files/113/962/549/216/246/292/original/5580e85d85feb119.png
@futurebird London has these too. One of them flows through a metro station, above the trains.
https://metro.co.uk/2024/01/28/london-underground-station-secret-river-running-right-20185034/
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