Moslem (Islam) in America Before Columbus? Fact or Fiction?
The map clearly shows the eastern coast of South America, which is in the correct position with regards to Africa.
The coast of Brazil is shown in incredible detail, with many rivers accurately placed on the map. Although Reis used Columbus’s maps as a source, Columbus never went to South America, so Reis must have gotten that from earlier Muslim maps that he used as sources.
Furthermore, Reis’s map includes the Andes Mountains, which were not even explored by Europeans until the 1520s, a full decade after the drawing of Reis’s map!