Major European Explorers / Travelers to Sources of the Nile

caput Nili quærere or fontes Nili quærere
[i.e., to search for the head or source of the Nile]

A phrase the Romans applied metaphorically to problems that seemed unsolvable; hence, a mad endeavor.

Just yards downstream from the spring at Gish Abay, Ethiopia, source of the Blue Nile [2003 photograph courtesy of Pasquale Scaturro]

Blue Nile

White Nile