The fourth ridge could be said to begin at Toppo di Castelgrande (Pescopagano) and runs as far as the Pollino, on the borders with Calabria. Halfway we find Potenza, which is the region's capital and the highest in Italy (819 m) with the mountains of Rifreddo and Sellata fully equipped with skiing facilities. The surroundings still boast expanses of dense woodland with turkey oaks and beeches, and holly with grassy fields of ‘stellina odorosa’ (scented starlets).