Castilla–La Mancha, or Castile La Mancha, is an autonomous community of Spain. Comprising the provinces of Albacete, Ciudad Real, Cuenca, Guadalajara and Toledo, it was created in 1982. The government headquarters are in Toledo. Albacete is the most populous municipality. The region largely occupies the southern half of the Iberian Peninsula's Inner Plateau, including large parts of the catchment areas of the Tagus, the Guadiana and the Júcar, while the northeastern relief comprises the Sistema Ibérico mountain massif. It is bordered by Castile and León, Madrid, Aragon, Valencia, Murcia, Andalusia, and Extremadura. It is one of the most sparsely populated of Spain's regions.