1) Mythological river 
The Pishon or Pison is one of four rivers (along with Hiddekel (Tigris), Phrath (Euphrates) and Gihon) mentioned in the Biblical Book of Genesis. In that passage, these rivers are described as arising within the Garden of Eden. The Pishon is described as encircling `the entire land of Havilah.` == Identification == Unlike the Tigris and the Euph.....