Sounds like one of those urban‑legend hacks that live in the back‑channels. Usually it’s a spoof of a city that got wiped from open maps because the data owner decided it was “unnecessary” or there was a glitch in a big data dump. My first step would be to dig into the open‑source datasets from the city’s municipality and check for any anomalies—missing coordinates, sudden gaps in the shapefiles. Then I’d scan the raw Nominatim or OpenStreetMap data for orphaned nodes or ways that have a note like “to be deleted” or a comment from a mapper about a planned removal. If you’ve got the old GIS layers, you can overlay them with current maps; any hidden trail of code would usually show up as a leftover “deleted” element or a broken reference. Once you find those clues, I can help you write a script to pull out the coordinates and maybe even reverse‑engineer the original map files. Give me the dataset URL or the name of the city, and we’ll see if this is a myth or just a neat little data puzzle.