Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. WAdi Al-Rummah (ar: ) is one of the Arabian Peninsula''s longest valleys. IT crosses the the peninsula from the east starting near Medina city at Al-Abyad Mountain (The White Mountain) towards the north-east and ends at Thwairat Dunes and is about 600 km long. THe valley connects to several smaller wadis like Mohallani Wadi and Murghala Wadi from the north side, and Jifn Wadi and Jarir Wadi from the south. AL-Rummah wadi sinks deep into Al-Dahna Desert''s sand dunes from the east, and is called Mistewy Wadi, then emerges on the west side as Wadi Al-Batin and continues towards the north-east to pour into The Gulf southern Iraq.