Black Volcano at Harrat Khaybar volcanic field, Saudi Arabia 

Ḥarrat Khaybar is a volcanic field located north of Medina in the Hejaz, Saudi Arabia. It covers an area approximately 12,000 km².
The most recent eruption occurred between 600 and 700 AD. Man-made stone structures dating to the Neolithic period have been studied in Harrat Khaybar.
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