Red Tower is located in Alanya harbor. The octagonal planned structure symbolizes the city and is a 13th-century Seljuk work. It was built in 1226 by the Seljuk Sultan Alaeddin Keykubad I to Abu Ali Reha el Kettani, the master builder from Aleppo who built the Sinop Castle.

Since it was difficult to lift the stone blocks after a certain height during the construction, the upper part was built with baked red bricks and therefore named Kızılkule. Marble blocks from ancient times can be seen on the tower walls. The tower has an octagonal plan; each division is 12.5 meters wide, 33 meters high, and 29 meters in diameter. It has five floors, including the ground floor. A tall, spaced stone staircase reaches the top of the tower with 85 steps. The sunlight from the top of the building resembles the first floor. There is a cistern in the center of the building.