A military structure located near the Aliakmonas river in the region of Western Macedonia, Greece. The site's name, 'Θαμμένο Πολυβολείο' (Thamméno Polyvolío), translates to 'Hidden Polybolos' or 'Concealed Polybolos,' referencing an ancient Greek repeating ballista. No verifiable historical records, architectural details, or confirmed function for this specific location are present in the provided sources.
The surrounding region has a complex military history, but this particular structure's origin, purpose, and current state remain unconfirmed by available evidence.