Nariño
Departamento, southwestern Colombia, bounded by the Pacific Ocean on the west and Ecuador on the south. Its population is concentrated principally in the volcanic Andean highlands above 5,000 feet (1,500 m). The densely settled Altiplano (high plateau) of Túquerres-Ipiales, which is situated on the Ecuadoran frontier, is separated by the Guáitara River from that of the departmental
