The Municipal Park of "Sítio das Fontes" is set in a land of about 18 hectares, belonging to the municipality of Lagoa. It is a very special place because, despite its small area, we can find here a wide range of representative environments of the Mediterranean landscape - the marshland, a small temporary pond, abandoned agricultural areas and the plans and water lines. It is also an important event from the geological point of view the presence of springs and proximity of the Arade river. It is also interesting from a historical and cultural point of view because there are traces of human activity dating back to ancient times. The two water mills are the most eloquent testimony of this activity. A few water mills remain along the Arade River, between Portimão and Silves, almost all in poor condition or reduced to ruins, but well attest to the importance that had once to the local economy.