Palestinian adventurers walk amid dangerous cliffs during their journey to explore Valley and Cave of Saint Khreitoun near the West Bank city of Bethlehem, on October 25, 2021. To the southeast of Bethlehem, between the settlement of Tqoa’ and Herodium, lies the Wadi Khreitoun. Caves inhabited since the lower Paleolithic period and much more recently abound. Three in particular are noteworthy in the valley itself: Erq al Ahmar, inhabited in 8,000 BC, Um Qalaá where the first traces of fire have found going back at least until 500,000 BC and Um Qatfa. Man here has had to adapt to climatic change. Photo by Wajed Nobani