Karaköy — the lower station, located on the eastern end of Tersane Avenue at 41°01′22″N 28°58′30″E﻿ / ﻿41.0229°N 28.9749°E﻿ / 41.0229; 28.9749Coordinates: 41°01′22″N 28°58′30″E﻿ / ﻿41.0229°N 28.9749°E﻿ / 41.0229; 28.9749 Beyoğlu — the upper station at the Tünel meydanı (Tünel Square), located on the southern end of Istiklal Avenue at 41°01′40″N 28°58′19″E﻿ / ﻿41.0278°N 28.9719°E﻿ / 41.0278; 28.9719