Sidirokastro
Sidirokastro (Greek: Σιδηρόκαστρο; Ser-Drama-Lagadin-Nevrokop dialect: Βαλοβίστα, Валовища, Valovishta) is a town and a former municipality in the Serres regional unit, Greece. Since the 2011 local government reform it is part of the municipality Sintiki, of which it is the seat and a municipal unit.