Confluence of the Alberche and the Perales Nature · Aldea del Fresno, Sierra Oeste, Madrid The two rivers that cross the municipality meet very close to the town itself, along a stretch of riverside woodland, holm oak groves and juniper stands; the whole district falls within the Alberche and Cofio river basins Special Area of Conservation. Photo: No machine-readable author provided. Fev assumed (based on copyright claims). (Public domain) What to see and do in Aldea del Fresno