The waterfall on the river Fílveda is one of incomparable beauty, crash landing after more than 40 meters in successive smaller water falls. The strength of the river’s erosion faced with the fragility of the magmatic origin rocks on the riversides (metaporphyries granitoids and metarhyolites that the people commonly call “blackstones”), gave in approximately 200 meters of river an overall gap of 75 meters (400 to 325). Adding to the beauty of the waterfalls, the valley is still keeping the primary forest, constituting an excellent refuge for oak and deciduous tree groves which have been losing ground to the plantations of pine and eucalyptus.
The proximity of the sea determines in large measure the very humid climate that makes itself felt in the immediate vicinity of the Fílveda river, causing a leafy vegetation, adapted to the strong rainfall that occurs here. Oak groves (largely pedunculate oak) are refuge for species such as the common firecrest (small bird of delicate colors), columbine and the slender gold-striped salamander with its golden tones; the oaks joins the sweet chestnut and the wild cherry, yellow brushing these woods in the fall season. By the river develops an important stream forest dominated by black alder and ash, where occasionally appears a common holly. This mountain river accounts with the presence of the characteristics beautiful demoiselle and large damselfly red which, with its metallic blue and red tones, hardly go unnoticed. The otter moves kilometers up river to find food, and not far from here, near Romezal village, the very rare european chain fern brands presence.
