What is "ganboa"

Ganboa (1,412 m) is a summit on the Gipuzkoan side of the Aralar Range ( Basque Country), the mount having long been held as the highest in the range, while nowadays it trails second to Irumugarrieta. The peak, crowned with a mountaineer postbox, is surrounded by grasslands, secondary peaks and limestone karst terrain, where deep fissures are not rare to be seen.