Sığacık, which dates back to the Seljuk's, is well preserved enduring the dilapidating effects of history, nature and technology. After the destructive earthquakes, it has been reconstructed first by Aydinogullari and than by the Ottomans. After the realization of its strategically importance in the Aegean Sea by Piri Reis, it is reconstructed by Palak Mustafa Pasha with the order of Sultan Suleyman the Magnificent, with the stones brought from Teos ruins. The present condition of the citadel dates back to 1521-1522. Despite of its weariness, the citadel greets you together with the harbor and the sea.

Previously the citadel, which had been called as "Sigla", was used as a naval base rather than defensive purposes. It has three gates named; Kusadasi, Ayasilik and Seferihisar. In the naval base, there are primary walls and secondary walls where there are dormitories and drill fields for soldiers. In the secondary walls facing the sea, there are two towers and two gates. On the walls of the citadel, the second floors of some houses rise and stones from Teas can be seen beneath. On the north sides of the walls of the towers, which face the courtyard, there are parapets some of which are closed. The houses in the citadel are built close to each other, which have one or two floors. Generally the houses are built of sun-dried bricks and they have courtyards. The two-floored houses have bay windows and wooden shutters. The stairs and doors inside the houses are also made of wood. On the north of the citadel, the arch of Barbaras Hayrettin Pasha is ruined.

Sığacık, where you can eat the most fresh vegetables, fish species and fruits you have ever had, welcomes you to be discovered with its friendly people and supernatural beauty.