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Explore Umm Jirsan Lava Tube, Hejaz, Saudi Arabia
Within the Ḥarrat Khaybar lava field is the Umm Jirsan lava tube, with a length of 1,481 metres (4,859 ft) in three sections including two pieces of collapsed roof. It is Saudi Arabia's longest lava tube system. In August 2021, the analysis of many thousands of animal and human bones from the cave system revealed that striped hyenas (Hyaena hyaena) had used this as a den for around 7,000 years.
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