Located within the National Ecological Reserve, the Pataias Lagoon is the main wetland in the municipality, and one of the main migratory points for aquatic birds. There, it is possible to observe these species through the observatory, and also discover a variety of fish. On the shore, there is a picnic area where you can enjoy a picnic in contact with nature.

A group of dunes and cliffs that protect the Bay of São Martinho do Porto. It is located at 19 kilometres from Alcobaça and it is a geographical accident that, because of its shape, like a perfect shell, is unique in Portugal and in the rest of Europe. It has a three kilometres long stretch of sand and it is located between the Santana hillock to the south and the Farol hillock to the north.