I prefer shortness over accuracy.
Also "Sehenswürdigkeiten" is not even most accurate to translate POI because it is rooted in a sigthseeing context. There is not much Sightseeing to do at the work places i save as POI mostly
POIs are more general and would need to be something clunky like "Punkte von Interesse" or "gespeicherte Orte/Ziele". So i prefer POI for better readability and propably text flow.

Edit:
If there is something like an introduction or manual, i would write/define "gespeicherte Orte (POI)" once and keep POI for the rest of the apearences in app.