The majority of its territory is situated in the country's Caribbean lowlands, though the southwestern portion houses part of an extensive mountain range known as the Cordillera de Talamanca. The province shares its northern border with Nicaragua via the Río San Juan, its western borders with the provinces of Heredia, Cartago, and Puntarenas, and its southern border with Panama via the Río Sixaola. Within the province there are six cantons, or counties, which include Pococí, Guácimo, Siquirres, Matina, Limón, and Talamanca. Each "cantón" has several local districts.