Greek National Road 63

Greek National Road 63 (Greek: Εθνική Οδός 63), abbreviated as the EO63, is a national road in northern Greece. The EO63 originally ran from Serres to the border with Bulgaria near Promachonas, but parts of the road have been replaced by the A25 motorway. A small section of EO63 near Promachonas is part of European route E79.