Changary is a name of a mountain, which extends from the north-east of Koohdasht till the Seimareh River. On the peak of this mountain are the remnants of a few castles, the most important of which being the above mentioned. This castle overlooks the plains of Koohdasht. The remnants of this castle extends over an area of ( 100 x 75) sq. m. The said castle is most probably the largest castle of ‘Madan-Rood’ in the vicinity of Lurestan. In the past, this castle comprised of two sections and each section had several large and small chambers. Today only its northern ramparts are left to be seen.