The range forms the boundary between the
autonomous communities of
Galicia and
Castile and León. The highest point of the range is the
Cuiña Peak at . Other notable peaks are
Mustallar (1,935 m) and
Miravalles (1,969 m). The smaller
Serra do Courel lies south of this range, stretching parallel to it. The main trees in the range are
willow and
European alder close to water courses, as well as
chestnut,
ash,
common hazel,
oak and
common holly. Above there is
brushland with
tree heath and
juniper. This area of Spain contains many isolated rural communities that were largely cut off from the outside world until roads were built in the mid 20th century. The most significant element of the whole architecture of the area is the
palloza or
casa teito, stone buildings of ancient origin, with a circular or elliptical plan. ==Ecology==