of more than 1 meter covering all the area beneath the castle were hide-outs for the residents. But in reality, due to being aware of the changing climate in the region and the underground waters, the Sassanid engineers have equipped the castle with a dehumidifier. Falak ol-Aflak castle is made with different materials like stone and wood that are vulnerable to humidity. That is why the castle was built on the highest point of the city of Khoram-abad, so that the wind could penetrate the building and dry its foundations. Current status The castle is managed by the Iran Cultural Heritage Organisation and a protected site. See also Sassanid architecture Iranian architecture References External links Lorestan Province Cultural Heritage Organization Buildings and structures completed in 651 Sasanian castles Castles in Iran Prisons in Iran Military history of Iran Tourist attractions in Lorestan Province 3rd-century fortifications Buildings and structures in Khorramabad Tourist attractions in Khorramabad National works of Iran