© All Rights Reserved Avenida de Dom Carlos I at the mouth of the river Douro in Porto. This area is called Foz, which means river mouth and is a popular spot for promenading.Related images Crystal Palace Super Bock Arena - Porto Porto Town Hall (Camara Municipal) River Douro at Night Building on Rua do Rosário - Porto River side McDonald's - Porto Praça do Infante Dom Henrique - Porto