Hello :)

Are you really sure there's a 50 (!) meter high cliff in the middle of a city? cliffs are natural features. When it's man made we call them either embankment or retaining wall...
https://wiki.openstreetmap.org/wiki/Tag:barrier%3Dretaining_wall
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            Published using OSMCha: https://osmcha.org/changesets/161328185
            