Castle introduction: The entire castle is dangerous and difficult to climb. Although there are architectural remains such as houses and fragments of pottery and stone tools inside the fort, it is also rugged and difficult to navigate. Under the fort is the confluence of the Khunjerab River and the Karatyukul River. From its location, academic circles believe that this was a military fortress built around BC. Because of it, a valley to the north of the castle is called "Princess Castle Valley"; a lone cypress tree in the castle is called "Princess Castle". The local Tajiks call the Princess Castle "Kizkurgan", which means the city of girls. And this title is closely connected with the Tajik legend that they are descendants of the "Han-Japanese people".