Wadi Al Mujib, historically known as Arnon, is a gorge in Jordan which enters the Dead Sea at 410 meters below sea level. The Mujib Reserve of Wadi Al Mujib is the lowest nature reserve in the world, located in the mountainous landscape to the east of the Dead Sea, approximately 90 km south of Amman. The 220 square kilometers reserve was created in 1987 by the Royal Society for the Conservation of Nature and is regionally and internationally important, particularly for the bird life that the reserve supports. It extends to the Kerak and Madaba mountains to the north and south, reaching 900 meters above sea level in some places.
This 1,300m variation in elevation, combined with the valley's year- round water flow from seven tributaries, means that Wadi Mujib enjoys a magnificent bio-diversity that is still being explored and documented today. Over 300 species of plants, 10 species of carnivores and numerous species of permanent and migratory birds have been recorded. Some of the remote mountain and valley areas are difficult to reach, and thus offer safe havens for rare species of cats, goats and other mountain animals. Mujib's sandstone cliffs are an ideal habitat for one of the most beautiful mountain goats in the world, the horned Ibex.