A unique phenomenon in Portugal, quite rare in the world, that consists of rocks that grow and set free from the "mother-rock", hence the name of "pedras parideiras".

The Arouca Geopark covers the administrative area of Arouca municipality, which has been stated by his exceptionally located geological heritage of international relevance recognized by European and Global Network of Geoparks of UNESCO since April 2009. The valuable and unique geological heritage inventoried covers a total of 41geossítios especially the famous Parideiras Stones in the village of Castanheira (Serra da Freita) and the Trilobites Canelas giants.

A well known waterfall that falls, at an altitude of 60 metres, from the top of the Freita Hill. It is located between Vale de Cambra and Arouca.

It has its spring on the Freita hill, in Urrô, and its mouth on the Arda river, in Rossas.

It has its spring on the Nave hill, at Moimenta da Beira, and its mouth on the Douro river, near Castelo de Paiva.