Sialk's a large ancient archeological site near Kashan, Iran, tucked away in the suburbs of the city of Kashan, in central Iran, close to Fin Garden. The culture that inhabited this area has been linked to the Zayandeh Rud Civilization. The Sialk ziggurat has 3 platforms, and was built ca. 2900 BC. However, the earliest archeological remains of the north mound date back to the middle of the 6th millennium BC; for example about 7,500 years ago. A joint study between Iran's Cultural Heritage Organ… (More on Sialk)