Athinios port or simply Athinios (Greek: Αθηνιός) is the primary seaport of Santorini, located approximately 10 km south of the capital Fira. It is the only port on Santorini with regular passenger ferry services linking the island to Piraeus, Cyclades and Crete. Athinios is surrounded by steep, multi-colored volcanic cliffs, along which a road winds to the top, zigzagging backwards and forward.