The Dardanelles (; , ), formerly known as Hellespont (; , Hellespontos, literally “Sea of Helle”), is a narrow strait in northwestern Turkey connecting the Aegean Sea to the Sea of Marmara. It is one of the Turkish Straits, along with its counterpart, the Bosporus. It is located at approximately . The strait is long but only wide, averaging deep with a maximum depth of . Water flows in both directions along the strait, from the Sea of Marmara to the Aegean via a surface current and in the opposite direction via an undercurrent. Like the Bosporus, it separates Europe (the Gallipoli peninsula) from the mainland of Asia (Anatolia). The strait is an international waterway, and together with the Sea of Marmara and the Bosporus, the Dardanelles connects the Black Sea to the Mediterranean Sea. The Çanakkale Suspension Bridge has been planned, connecting Sarıçay (a district of Çanakkale Province) on the Asian side to on the European side. At this point, the strait is narrowest.