Before starting the journey through the Serra, we suggest a visit to the simple village of the Castle, whose name still evokes the memory of the medieval fortification that has disappeared. At the top of the hill, next to the Chapel of Mrs. do Castelo, there is still a pre-Romanesque frieze of the medieval temple. From there we can see vast horizons over the Fornelo valley and the Marão slopes.
Returning to the course and up the Serra, you will come across two dolmens of the megalithic set of the Serra da Aboboreira. The first one, called Furnas 2, is located on a small elevation, with a wide visibility from it, observing the Serra do Marão to the north and northeast. It is a closed dolmen, which integrates the first moment of construction of this type of monuments in the Serra da Aboboreira: between the end of the V and the beginning of the IV millennium BC The second, Meninas do Crasto 3, already includes a second constructive moment that occurred at the beginning of the fourth millennium BC. The modest dimensions and the cover slab give this monument a certain grace.
Further on you will find the "Stone of the Sun", a granite batholith that, because it is isolated, works naturally as a clock of the sun. This factor will certainly have influenced the designation assigned to it by the shepherds of Serra da Aboboreira.
Places of obligatory visit along the route are the rural clusters of mountain - Aldeia Velha, Aldeia Nova, Pé Redondo - singular expression of the settlement in altitude, of concentrated pattern that contrasts with the dissemination in small places typical of the lowlands. They retain a characteristic traditional architecture, often polarized in a common threshing floor surrounded by sets of granaries.
The rational use of the available resources is evidenced by the traditional ways, which are often used to get where water passes before reaching the fields. A traditional way of fertilizing the land, washing the sidewalks of the excrement that the cattle leaves when passing in the ways of the villages. In this way, traditional farmers have transformed an urban environment that is not very attractive, in a habitat of high ecological interest. The diversity of plants found in these agricultural roads in the rural interior is the remarkable testimony that Man and Biodiversity are not incompatible. The sucker, the urtigão and the poejo are just some of the plants that punctuate these paths.
In these villages it is common to find the chimpanzee, whose presence is well tolerated by the populations, since this bird feeds on the undesirable insects, very common in areas with livestock. In the environs of the villages one observes a waist of hortas, lameiros and agricultural fields, that tends to diminish due to the desertification of the rural interior. In the marshes, true repositories of plant diversity, you can find showy grasses such as the hay, the weed or the weed.