Close to the Dom Luis Bridge, there is a store that rents bikes for the day so I headed for one and road along the beach. You can ask the bike store for the bike routes. Everything is close—the Cais da Ribeira or riverfront district, the Douro River, the Serralves Museum, Casa da Musica, São Francisco Church, the Cathedral, the Caves do Vinho do Porto (port wine cellars)—there are different cellars and bars that offer port tasting. And well, port is a wonderful thing. Portuguese food is exquisite. For breathtaking views, a cool crowd but still relaxing, and excellent food head to the beachside Shis Restaurant, Praia do Ourigo—Esplanada do Castelo, Foz.