Once a waste disposal site, Wadi Hanifa is now a beautiful valley running a length of nearly 120 km from the northwest to the southeast of the capital. Known in the pre-Islamic era as Wadi Al-Irdh, it was renamed Wadi Hanifa after the Bani Hanifa tribe that populated the area.
In 1986, the Arriyadh Development Authority (ADA) launched a plan to turn the dump into a nature reserve, attracting local and foreign visitors, and encouraging investments. The redevelopment plan involved creating water channels, trails, and spots for visitors to observe the spectacular views the valley has to offer.
According to the ADA, the decision taken in 1986 proved to be a significant milestone as it helped transform the valley into the largest natural reserve in the Kingdom. In addition, the wetlands became a stop for migratory birds and a popular area for recreation.