From the London Mail [caution tabloid]:
A series of orbital scans has revealed an ancient, now-dry riverbed in Saudi Arabia that some scholars believe aligns with the biblical description of Eden’s main river, the Pishon. The Book of Genesis describes Eden as a paradise watered by a single river that split into four: Pishon, Gihon, Tigris, and Euphrates. While the Tigris and Euphrates are well-known rivers in modern-day Iraq, the Pishon and Gihon have long been lost to history, until now.
The dry riverbed, called Wadi al-Batin, stretches from the western highlands of Hejaz near Medina northeast to the northern Persian Gulf near Kuwait.