Kız Kulesi :
Considered to be a symbol of Istanbul, this tiny tower was established on a small island at the entrance of the Bosphorus. In the past, it was used as a watchtower and a lighthouse, until its present purpose of a tourist attraction. Western sources describe this as Leander's Tower, who was drowned while swimming, to reach his lover Hera. Another story suggests that it was a tower where an emperor's daughter put her in there for security, having dreamt that she would be bitten by a snake.
Galata Tower :
The tower was built by the Genoese in 1348, during their occupation of the area, primarily to prevent attacks. Originally known as the Tower of Christ, it stood above the fortification surrounding the Genoese city-state. There is a spiral rock staircase which ascends to the top viewing platform, which today offers visitors spectacular 360 degree panorama of the entire city. The tower was restored in 1967, and an elevator was installed to offer a less tiring alternative to the steep climb. There is also a restaurant on the top floor.
Beyazıt Tower :
Within the grounds of the central building of Istanbul's University, (formerly the palace of Mehmet the Conqueror) this wooden tower was built for fire watchers, and remains a landmark throughout the city. Mahmud II demolished it in order to construct a better one, and according to the inscription, he ordered a rock-filled tower in 1828 to be built by the Ministry of Defense. The monument is 50m high, and from the upper landing, accessible via wooden staircase, offers a superb overview of the city.