Salasel Castle is a very big fort which had spacious and various yards, barracks , stables , bathrooms , naves ,towers, little gardens, arsenal, Naqareh Khane( a place where the drums are beaten at fixed intervals), Haram Khane( sanctuary house) , kitchen, big basins, fence and ditch.
This castle with 15 historical works of Shushtar is registered as tenth work of Iran in Ionesco World Heritage Site. Nowadays all of its buildings are destructed and nothing is left except tunnels.
Historical texts show this castle was present at Achaemenian era.