Syria lies between latitudes 32° and 38° N, and longitudes 35° and 43° E. The climate varies from the humid Mediterranean coast, through a semiarid steppe zone, to arid desert in the east. The country consists mostly of arid plateau, although the northwest part bordering the Mediterranean is fairly green. Al-Jazira in the northeast and Hawran in the south are important agricultural areas. The Euphrates, Syria's most important river, crosses the country in the east. Syria is one of the fifteen states that comprise the so-called "cradle of civilization". Its land straddles the "northwest of the Arabian plate".