Covering over 5 hectares atop Kuh-e Khuaja near Zabol, stands as one of the most important Iranian historic city-fortresses and an important unfired (place) brick ensemble of pre-Islamic and early Islamic Iran in the region. It includes remains from the Parthian, Sassanid and the early Islamic periods which feature outstanding architectural decoration (frescoes and stucco carvings). Historically and artistically, this site bears quasi-religious value.