The Great Rift Valley is a name given in the late 19th century by British explorer John Walter Gregory to the continuous geographic trench , approximately 6,000 kilometres ( 3,700 mi ) in length , that runs from northern Syria to central Mozambique in South Eastern Africa .
The Great Rift Valley is a name given to the continuous geographical trench , about 6,000 kilometres ( 3,700 mi ) in length , that runs from northern Syria in Southwest Asia to central Mozambique in East Africa .