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Photo: Lars Holmer, CC BY 3.0 via Wikimedia Commons
The remains of a 200-km wall run several kilometers north of the town from Gomishan east to the Golidagh mountains. It is believed to have been built in the 6th century CE.
The Great Wall of Gorgan is a Sasanian-era defense system located near modern Gorgan in the Golestān Province of northeastern Iran, at the southeastern corner of the Caspian Sea.
© OpenStreetMap contributors
The bridge was constructed in the 9th century with repairs being made later during the Safavid dynasty.