As it happens, if you go to Mount Behistun in western Iran you'll find a long smooth section carved into the stone that is decidedly not natural. Called the Farhād Tarāsh, it is 30 meters high and 200 meters long.
Its origin is unknown. A medieval geographer named Istakhri, who died in 957, had no idea whence it came. Near the Farhād Tarāsh are several hundred dressed stone blocks that would be suitable for the start of a wall or a building's foundation. They have been dated to the same era as the wall carving.
Farhad is only known from Nizami Ganjavi's famous tragic romance Khosrow and Shirin, which he started writing in c. 1180. Did Nizami Ganjavi know something about the history of Mount Behistun? Or did he simply take a mystery and come up with a fiction that explained it and added a tragic note to his story? (Farhad threw himself off the cliff when he was told that Shirin was dead.)
One archaeologist thought the stone face was created to be the frame for an inscription by Darius the Great (reigned 522-486 BCE). Another theorized it was the beginning of a planned palace by Khosrow II, and that the literary link to his reign was evidence of such. Khosrow also reigned over a Golden Age of sorts before the Muslim conquest of Iran.
None of the theories can be proven, but it makes for an interesting footnote to the romance of Khosrow and Shirin, which we will get back to tomorrow.







