The dune formations are very sensitive zones due to their sandy constitution. They are of great importance because they are the best defense against the intensity of the winds, the sands and the advances of the sea. To preserve the geomorphological, floristic and faunistic heritage of the dunes is to prevent the advance of the sea and to safeguard the life of the populations.
The Natural Reserve of S. Jacinto Dunes covers an area of approximately 960 ha, of which 210 ha correspond to the sea area. It is located at the end of the peninsula that stretches between Ovar and the village of S. Jacinto. It is limited to the west by the Atlantic Ocean and the spring by one of the arms of the estuary of Aveiro.
On the 18th June, 2019,, at 9:00 a group of 31 employees from Altice Labs entered the ferry that took them to S. Jacinto for the visit to this Reserve, which lasted approximately 3 hours
