The Bishop's Palace with the Ribeira Quay and Ponte de Dom Luis I bridge over River Douro, Porto (Oporto), Portugal, Europe

Vila Nova de Gaia seen from Ribeira quays, Oporto, Portugal, Europe

Cais da Ribeira, facing the bridge Ponte de Dom Luis I, Ribeira Quay, behind the monastery Mosteiro da Serra do Pilar, Vila Nova de Gaia, Rio Douro River, Porto, a UNESCO World Heritage Site, Portugal, Europe

Cais da Ribeira with a view of the Ponte de Dom Luis I, Dom Luis I Bridge, Ribeira Quay, at back the Mosteiro da Serra do Pilar Monastery, Vila Nova de Gaia, Rio Duoro River, Porto, UNESCO World Cultural Heritage Site, Portugal, Europe

Cais da Ribeira with a view of the Ponte de Dom Luis I, Dom Luis I Bridge, Ribeira Quay, at back the Mosteiro da Serra do Pilar Monastery, Vila Nova de Gaia, Rio Duoro River, Porto, UNESCO World Cultural Heritage Site, Portugal, Europe

Ceramic tile structure of a typical facade at Ribeira Quay, Porto, UNESCO World Cultural Heritage Site, Portugal, Europe

Cais da Ribeira with a view of the Ponte de Dom Luis I, Dom Luis I Bridge, Rio Duoro River, Ribeira Quay, Porto, UNESCO World Cultural Heritage Site, Portugal, Europe

The historic centre of Porto with the Ribeira Quay, Rio Duoro River, Porto, UNESCO World Cultural Heritage Site, Portugal, Europe

The Bishop's palace next to the Cathedral of Porto, historic centre of Porto with the Ribeira Quay, Porto, UNESCO World Cultural Heritage Site, Portugal, Europe

Typical facades at Ribeira Quay, Porto, UNESCO World Cultural Heritage Site, Portugal, Europe

Typical tourist boat on the Duoro River, at back the Ribeira Quay, Porto, UNESCO World Cultural Heritage Site, Portugal, Europe

Ponte de Dom Luis I Bridge, Ribeira Quay, Rio Duoro River, Porto, UNESCO World Heritage Site, Portugal, Europe

Typical facades at Ribeira Quay, Porto, UNESCO World Cultural Heritage Site, Portugal, Europe