If you are a nature lover, you cannot miss this tour. If you are a bird lover then it becomes a must! Under the guidance of our guide Carlos Cera, you will witness a true spectacle of nature. The Tagus estuary, measuring 32 km2, is the largest estuary in Western Europe. It has a natural reserve of 14,000 hectares, where 200 different species of birds have been identified. Regular counts indicate that the number of wintering species reaches 120,000 birds.