Hasanbour Castle

Hasanbour Castle, also known as Sorkhkola Castle and Kasilian Castle, is one of the valuable historical monuments of Savadkuh County in Mazandaran Province. Dating back to the Sasanian era, the castle stands about 7 kilometers north of Sorkhkola village, within the Shahkuh and Leyli forests. Its location in the heart of the dense forests of northern Iran points to its strategic and military importance in ancient times. The monument was added to Iran's National Heritage list on 24 Esfand 1383 and is regarded as one of the region's most important remains of defensive architecture, although a considerable part of it has since been eroded by natural and human factors.

The castle was also in use during the 6th and 7th centuries AH (Hijri lunar), and its structure reflects advanced engineering knowledge in the design of defensive fortifications. The remains of walls of considerable thickness, the use of stone, various kinds of brick and sarooj (traditional waterproof mortar) in the construction, and the presence of gutter-shaped pottery fragments on the site are among the distinctive features of this historical site. In the central part of the castle, the remains of a large water reservoir (ab-anbar) have also been found, indicating a system for collecting and channeling rainwater and showing careful management of water resources in the past. Despite serious damage caused by the humid forest climate, the growth of tree roots and illegal excavations, the castle still has considerable historical and archaeological value.

The castle can be reached via Sorkhkola village and then along the forest trails of Shahkuh, which requires hiking through pristine nature and forest paths. The best time to visit this historical monument is spring and early autumn, when the weather is milder and the landscape is at its most beautiful. Visitors should follow the principles of responsible nature tourism, including not damaging the historical remains, avoiding harm to vegetation and keeping the environment clean, so that this valuable heritage is preserved for future generations.