Between the Central and Northern mountain ranges lies the rich and fertile Cibao valley. This major valley is home to the cities of Santiago and La Vega and most of the farming areas of the nation. Rather less productive are the semi-arid San Juan Valley, south of the Central Cordillera, and the Neiba Valley, tucked between the Sierra de Neiba and the Sierra de Bahoruco. Much of the land around the Enriquillo Basin is below sea level, with a hot, arid, desert-like environment. There are other smaller valleys in the mountains, such as the Constanza, Jarabacoa, Villa Altagracia, and Bonao valleys.