Top 11 Natural Monuments around Ventosa

The area of the springs, on the Ota River, was once a leisure area for the local population, including the local bathing area in the summer. This site remained natural for a long time after the EPAL was installed, but at a certain point, the intensification of agriculture with the use of chemical fertilizers and pesticides, intensive livestock farming, and urban sewage made the flow from upstream a polluting threat to EPAL's water intakes, and EPAL paved several dozen meters of the river course near the site where it is installed with reinforced concrete.

The Ota River has its source in the Montejunto mountain range. It flows through the Ota area and empties into the Alenquer River, which in turn meets the Tagus River near Vila Nova da Rainha. At this point the river is close to the village of the same name, Ota.

The Serra de Montejunto Forest Watch Station can be accessed via a pastoral trail from the picnic park. It offers a beautiful panorama of the region north of the Serra.

Castro de Pragança, located in Serra de Montejunto, is an archaeological site occupied from the Neolithic period to the Roman period. Discovered in 1893, its study revealed traces from various eras. Its archaeological collection is distributed across several national museums and, despite several excavation campaigns and studies, the Castro is currently in a state of abandonment. Its fortifications date back to the first half of the 3rd millennium BC, and the materials found include weights and metallic artefacts, indicating a prolonged and complex occupation.

The karst landscape of Montejunto constitutes the extreme southwest of the Estremenho Limestone Massif. Deep valleys, lakes, gravel pits and lapiás are some of the formations found here, testimonies of various geological eras. Water has been the protagonist in erosion phenomena over time. Several deposits of gravel pits result from the cracking of the outcrops caused by the expansion of the water which, when freezing, breaks the rock into small parts. Source: https://montejunto.pt/natureza/paisagens/

Interesting trail, which passes right next to several windmills, some of them recovered. The trail has small sections with very steep slopes, so the easiest way to do it is downhill, that is, towards Serra de Montejunto, Vila Verde dos Francos. For those who are in Vila Verde dos Francos, it is preferable to go up the Estrada de Montejunto (N-115) to the sign that says Caminho dos Moinhos, and then turn right.

It is located in Picoto do Castelo, close to Pragança, on the northwest slope of the Serra de Montejunto. It was discovered in 1893 and since then has been the subject of continued study. Traces found in the area indicate that it was a settlement occupied since the Late Neolithic, through the Copper, Bronze and Iron ages, and finally Romanized, with signs of occupation until the 1st century. several national museums, being considered very important for the study of Prehistory, Protohistory and the Romanization of the country. Castro de Pragança is currently in quite abandoned condition.

It rises in the Montejunto mountain range, passes through the clusters of Eiras, Abrigada, Atouguia, Ota and Aldeia, in the municipality of Alenquer and flows into the right bank of the Tagus river near Vila Nova da Rainha, side by side with the Alenquer river. Of its layout stands out, in particular, the “Cannon” of the Ota river valley, which presents geomorphological characteristics of the greatest relevance at a national level.