Zilkale

Zilkale is a medieval castle located in the Fırtına Valley (literally: "Stormy Valley"), and is one of the most important historical structures in Çamlıhemşin district of Rize Province in the Black Sea Region of Turkey.

The castle is built at an altitude of 1130 m, and sits at the edge of a cliff overlooking the Fırtına Creek (Fırtına Deresi approximately 380 m below running at an elevation of 750 m southeast of it. The castle consists of outer walls, middle walls and inner castle. There are garrison quarters, and a possible chapel and head tower. It is believed that the castle was built in the 14th-15th century.

Etymology
Zilkale: Turkish zil for "bell" and (Turkish) kale for "castle".

Alternatively: Zilkale: Persian zir "lower" and (Turkish) kale for "castle".