The Rhoda Island Nilometer, and island in the Nile.
Rhoda Island or Rawdah Island, (Arabic: جزيرة الروضة, Gezīret er-Rōdah and Al Manyal ar-Rawdah ), is an island located on the Nile in central Cairo. 
The El-Manial District, and the Al-Manyal Palace Museum and gardens, are located on the island. It is west of historic Old Cairo, across a small branch of the Nile. The island has one of the oldest Islamic buildings in Egypt, the Nilometer on its southern tip.