asked on https://www.openstreetmap.org/changeset/60706885 - it is a bit confusing as many edits here were made without edit comments, without stating source and several points mapped here are without main tags

overall it looks like mapping no longer existing objects that disappeared without any trace (beyond information board which is mapped)

though maybe there are at least some faintly visible ruins? In such case ruined:???=???? tags can be added 