(Persia Digest) – Kurd Olia underground city is one of the world’s special underground worlds dating back to Parthian times. This was used as a military base.

The city is in Karoun district near Tiran town in Isfahan province. It has a surface area of 20 thousand square meters and is one of the world’s unusual underground cities. The Parthians used it as a military-security base. It was discovered in 2016 and 1600 square meters of it have opened to the public thus far. Click here to view the photos of this news.

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