Passage through the Siq channel at Jabal Ithlib area within the Site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

siq channel jabal ithlib hegira alula saudi arabia unesco heritage site visitors sandstone cliffs natural beauty historical significance landscape exploration adventure tourism desert culture tradition travel geology formations ancient archaeology rock formation sunlight shadows scenic view outdoor oasis breathtaking serenity wilderness environment majestic sand sky nature diversity wanderlust tranquility cultural