It is located in Teruel Province, in the transitional area between the Iberian System and the Ebro Valley.

It borders the Aragonese comarcas of Ribera Baja del Ebro, Campo de Belchite, Cuencas Mineras, Andorra-Sierra de Arcos, Bajo Aragón and Bajo Aragón-Caspe.

[2] This comarca was formerly connected with Tortosa by means of a railway line from La Puebla de Híjar.

Known as "Ferrocarril del Val de Zafán", the line stretched to Alcañiz and Tortosa.

Eventually it was planned that it would reach the sea at Sant Carles de la Ràpita.