Greek National Road 57 is a national highway of Greece. It connects Drama with the Bulgarian border near Exochi, via Prosotsani and Kato Nevrokopi. At the border it is connected with the Bulgarian national road 19 to Gotse Delchev.
Map of EO57, Kato Nevrokopi 660 33, Greece
References
Greek National Road 57 Wikipedia(Text) CC BY-SA