Ria Formosa is a place of extreme nature, with an environment that is always different at every hour of the day. This is due largely to the fact that the sea level rises and falls about 3 meters every 6 hours. Whilst there, you will discover a complete self-regenerating ecosystem, which allows a part of the local population to develop fishing and shellfish production. This provides all of the ingredients for the varied diets of the migratory birds that continue returning to this area year after year. Watch the hunting of predatory birds, or enter into a maze of canals where the only thing that you will hear is the sound of the birds calling and their interactions with one another. At the conclusion of your tour, you will return by boat to your tour's point of origin.