Greek National Road 81 (Greek: Εθνική Οδός 81, abbreviated as EO81) is a single carriageway road in Attica, Greece. It connects the northern suburbs of Athens with Kalamos, near the north coast of Attica.
38°15′52″N 23°51′33″E / 38.2644°N 23.8591°E / 38.2644; 23.8591
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