Wadi Digla rises in the mountains of the Eastern Desert and runs northwest to the Nile Valley just south of Cairo at Maadi. It runs through limestone terrain cutting a deep winding canyon; in parts, floodwaters have carved the rock into spectacular shapes. There are numerous fossils in the rock formations and scattered patches of petrified wood. After rain, ephemeral plants carpet the wadi. Dorcas Gazelle, and Nubian Ibex, have been reported in recent years; Lesser Mouse-tailed Bats, live in the caves in the wadi sides. Wadi Digla is an extremely popular destination for Cairenes and expatriates wishing to escape the stress of city life. It is also a good place to indulge in a spot of bird watching or simply relax with a picnic in the fresh air.