© 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 Rua de Santa Catarina - Porto River Douro View from Ribeira to Arrabida - Porto Porto backstreets Companhia Aurifícia building - Porto Typical Porto menu Porto - Houses behind the Ribeira