paliurus spina-christi jerusalem thorn tree broken in half in dry, rocky wadi ghargur riverbed, united arab emirates

arab arid barren branch broken christs climate copper crown damaged desert desolate dirt dry dubai east emirates footpath garland ghargur green hajar half hatta hiking jerusalem khaimah landscape lush middle mountain nature paliurus path plant ras remote riverbed road rock sand sharjah spinachristi stone thorn thorns thron trail travel tree trekking uae united valley vegetation wadi wood