The Oltan fortress in northwest Iran, a significant mud-brick archaeological site, may soon gain UNESCO World Heritage status, according to Iranian archaeologist Rouhollah Mohammadi. Located along the Aras River near Oltan, the fortress features historical elements such as a first-millennium BC cemetery, the Oltan tappeh from the Parthian and Sassanian periods, and a central citadel spanning various eras. Research began in 1971, revealing an expansive layout and historical depth. With ongoing preservation efforts and potential for tourism, experts believe Oltan fortress could become a major cultural destination, comparable to Iran’s UNESCO-listed Arg-e Bam.