While you're in Santa Marinha, take in top sights like Cais de Gaia and jump on the metro at Jardim do Morro Station to see more of the city.
While visiting Canidelo, you might make a stop by sights like Lavadores Beach and Local Nature Reserve of Douro Estuary.
If you're spending some time in Oliveira do Douro, Duoro River and Lavandeira Municipal Park are top sights worth seeing.
Though Madalena might not have many top sights, you can venture to the surrounding area to see attractions like Lavadores Beach and Ribeira Square.
While you're in Mafamude, take in top sights like El Corte Inglés de Gaia or Teixeira Lopes House Museum, and hop on the metro to see more the city at João de Deus Station or Câmara de Gaia Station.