Tibesti and Tibesti mountains, Tchad.

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  Administrative regions of Chad
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  Topography, map
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  Tibesti Omou and Bardai region (Wikipedia: Bardaï, Chad)
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  Omou, Tarso Toon, ...
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  Tarso Toon
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  Omou region,
  a view from International Space Station

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  Wadi Enneri Odrisou, Omou, ISS picture with annotations
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  Dry Sahara Desert, volcano Tousside and clouds, a view to Mediterranean Sea,
  volcano Waw an-Namus in North
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  Pic Toussidé with clouds and shadows of clouds,
  caldera Trou au Natron photo with lake (1)
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  October 27, 2018 photo (2), (Wikipedia article: Trou au Natron)
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  October 27, 2018 photo (3)
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  later (without clouds): Volcano Toussidé on November 5, 2018
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  volcano Emi Koussi in left side, North Chad
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  Emi Koussi
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  inner crater of Emi Koussi (2010)
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  Tchigaï Plateau in North West
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  A view from West (Niger), Tchigaï Plateau, Rebiana Sand Sea. In left side: Murzuq Desert
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  a remote view of Egypt, a "satellite" picture of Emi Koussi (from ISS).
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  photo from North, in the middle Omou region and Tarso Toon
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  a region with structures, ...
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  ... East side of Bikku Bitti,
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  Bikku Bitti (Picco Bette)
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  map, deserts