Falak-ol-Aflak Castle is a historic fortress located in Khorramabad, Iran. Built during the Sassanian era, it stands on a hilltop, offering stunning views of the surrounding landscape. The castle features impressive stone walls and towers, showcasing the architectural style of its time. The castle has served various purposes throughout history, including military defense and royal residence. Today, it is a popular tourist attraction, drawing visitors interested in Iranian history and culture. The site also houses a museum that displays artifacts from the region, enriching the experience for those who explore its ancient grounds.