In old times, the fortress was protected by a river that ran past its eastern and south western sides. But today, the historical landmark is surrounded by residential districts.
The castle is one of the most important structures built during the Sassanid era. After its original function as a fortress, it was used as a prison and then was transformed to be a museum complex.
The Anthropology museum of Falak-ol-Aflak includes different halls with historical photos and other sections to introduce the culture of people in the Lorestan Province.
Nowadays, the castle is a symbol of the Iranian province of Lorestan and annually hosts tourists from around the world.