The Dom Luis I Bridge spans the River Douro to the Ribeira District UNESCO World Heritage Site, Porto, Douro, Portugal, Europe

A boat cruises on the River Douro, past the Ribeira District, UNESCO World Heritage Site, Porto, Douro, Portugal, Europe

The River Douro runs alongside the Ribeira District, UNESCO World Heritage Site, Porto, Douro, Portugal, Europe

St. Nicholas Chapel (Capelo do Sao Nicolau), in the Ribeira District, UNESCO World Heritage Site, Porto, Douro, Portugal, Europe

Buildings overlook the River Douro on the Ribeira District, UNESCO World Heritage Site, Porto, Douro, Portugal, Europe

Ribeira District, Porto City, Portugal, Europe

Sunset over Ribeira district, the Douro, Rabelos and Ponte Dom Luis I Bridge, UNESCO World Heritage Site, Oporto (Porto), Portugal, Europe

Sunset over Ribeira district and the River Douro with Rabelos, UNESCO World Heritage Site, Oporto (Porto), Portugal, Europe

Ribeira District, UNESCO World Heritage Site, Porto City, Portugal, Europe

Ribeira District, UNESCO World Heritage Site, Porto City, Portugal, Europe

Ribeira District, Porto City, Portugal, Europe

Ribeira District, UNESCO World Heritage Site, Porto City, Portugal, Europe

Ribeira District, UNESCO World Heritage Site, Porto City, Portugal, Europe

The Dom Luis I Bridge and Ribeira district of Porto, UNESCO World Heritage Site, viewed from the Gaia Cable Car, Porto, Portugal, Europe

Sao Francisco Church, 600 years old, in the Ribiera district, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Ribeira District, UNESCO World Heritage Site, Se Cathedral, Palace of the Bishop, Ponte Dom Luis I Bridge, Porto (Oporto), Portugal, Europe

Traditional waterfront houses in the Ribeira district on the Douro River with crowd on river bank, Porto, Portugal, Europe

Traditional colourful buildings with balconies and umbrellas on the bank of Douro River in the Ribeira District, Porto, Portugal, Europe

View of traditional buildings with balconies and azulejo tiles, Ribeira District, Porto, Portugal, Europe

Former Episcopal Palace overlooking Ribeira district and Ponte Dom Luis I Bridge, UNESCO World Heritage Site, Oporto (Porto), Portugal, Europe

Sunset over Ribeira district and former Episcopal Palace, UNESCO World Heritage Site, Porto, Portugal, Europe

Ribeira district, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Ribeira district, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Traditional waterfront houses in the Ribeira district and boat on the Douro River, Porto, Portugal, Europe

Sunset over Porto looking towards the Ribeira district from the Dom Luis I Bridge, UNESCO World Heritage Site, Porto, Portugal, Europe

View from Ribeira of Ponte Dom Luis I Bridge, Porto, Porto District, Norte, Portugal, Europe

The Douro riverfront district of Ribeira at sunset, UNESCO World Heritage Site, Porto, Portugal, Europe

Sao Francisco Church, 600 years old, in the Ribiera district, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Ponte Dom Luis I Bridge over Douro River to Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Boats on the Douro River and traditional houses of Ribeira District seen from Vila Nova de Gaia district, Porto, Portugal, Europe

Sunset over Porto looking towards the Ribeira district and Dom Luis I Bridge over the River Douro, Porto, Portugal, Europe

Ponte Dom Luis I Bridge at sunset, Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

View over Douro River to Ribeira District, UNESCO World Heritage Site, Se Cathedral, Porto (Oporto), Portugal, Europe

Ribeira, Porto, UNESCO World Heritage Site, Porto District, Norte, Portugal, Europe

Boats of the Port Bodegas on the Douro River looking towards the Ribeira district of Porto, Portugal, Europe

The view over the Douro River looking towards the Ribeira district of Porto, UNESCO World Heritage Site, Porto, Portugal, Europe

Ribeira district, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Ribeira district, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Ribeira district, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Se Cathedral at sunset, Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

View of Ribeira at dawn, Porto, Porto District, Norte, Portugal, Europe

Ribeira, Porto, UNESCO World Heritage Site, Porto District, Norte, Portugal, Europe

Ribeira District, UNESCO World Heritage Site, Se Cathedral, Palace of the Bishop, Ponte Dom Luis I Bridge, Porto (Oporto), Portugal, Europe

Ribeira, Porto, UNESCO World Heritage Site, Porto District, Norte, Portugal, Europe

View from Vila Nova de Gaia View over Douro River at sunset to Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Douro River and Ribeira district, UNESCO World Heritage Site, Porto, Portugal, Europe

Ponte Dom Luis I Bridge over Douro River to Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Ribeira District, UNESCO World Heritage Site, Se Cathedral, Palace of the Bishop, Porto (Oporto), Portugal, Europe

Sunset over Porto looking towards the Ribeira district from the Dom Luis I Bridge, UNESCO World Heritage Site, Porto, Portugal, Europe

Ribeira district, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Se Cathedral at sunset, Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

View over Douro River at sunset to Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

View of city tram with Paco Episcopal do Porto and Ribeira district in background, Porto, Norte, Portugal, Europe

View of the Dom Luis I bridge over Douro River aligned with colourful buildings at sunset, looking towards the Ribeira district, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

The district of Ribeira on the Porto side of the River Douro, UNESCO World Heritage Site, Porto, Portugal, Europe

Ribeira District, UNESCO World Heritage Site, Se Cathedral, Palace of the Bishop, Porto (Oporto), Portugal, Europe

View of terracota rooftops of The Ribeira district from Dom Luis I bridge, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

Colourful houses of Ribeira, elevated view, Porto, Portugal, Europe

View of the terracotta rooftops of The Ribeira district overlooking the Douro River, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of Douro River and The Ribeira district from Dom Luis I bridge at sunset, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View over Douro River at sunset to Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

The view over the Douro River looking towards the Ribeira district of Porto, UNESCO World Heritage Site, Porto, Portugal, Europe

View over Douro River at sunset to Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

View of terracota rooftops of The Ribeira district from Dom Luis I bridge, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

Ponte Dom Luis I Bridge at sunset, Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

View of the Igreja dos Grilos Church and terracota rooftops of The Ribeira district at sunset, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of busy Rua de Mouzinho de Silveiro in The Ribeira district, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of buildings and terracota rooftops of The Ribeira district at dusk, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of the Igreja dos Grilos Church and terracota rooftops of The Ribeira district, UNESCO World Heritage Site, Porto, Norte,Portugal, Europe

View of colourful buildings and rooftops of the Ribeira district, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of Douro River and terracota rooftops of The Ribeira district, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of buildings and terracota rooftops of The Ribeira district at dusk, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of buildings and terracota rooftops of The Ribeira district at dusk, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of busy Rua de Mouzinho de Silveiro in The Ribeira district, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of colourful buildings and rooftops of the Ribeira district, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of Douro River and The Ribeira district from Dom Luis I bridge at sunset, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View over Douro River at sunset to Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Open air street stalls and markets with cork and gift products on Douro River in Ribeira District, Porto, Portugal, Europe

Open air street stalls and markets with cork and gift products on Douro River bank in Ribeira District, Porto, Portugal, Europe

Ribeira district, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

The Ribeira district on the waterfront of the Douro River, with the white facade of the Bishops Palace above, in the centre of Oporto, Portugal, Europe

Rabelos boat, Ribeira District, UNESCO World Heritage Site, Se Cathedral, Palace of the Bishop, Porto (Oporto), Portugal, Europe

Rabelos boat, Ribeira District, UNESCO World Heritage Site, Se Cathedral, Palace of the Bishop, Porto (Oporto), Portugal, Europe

Rabelos boat, Ribeira District, UNESCO World Heritage Site, Se Cathedral, Palace of the Bishop, Porto (Oporto), Portugal, Europe

Palau de la Musica Catalana, Palace of the Catalan Music, architect Luis Domenech y Montaner, Ribeira district, Unesco World Heritage Site, Barcelona, Catalonia, Spain, Europe

Aerial of the Iguape river, Unesco site Atlantic Forest South-East Reserves, Alto Ribeira Touristic State Park, Sao Paulo state, Brazil, South America

Madonna figure in volcanic rock, Ribeira de Janela, also Ribeira da Janela, Porto Moniz, Island Madeira, Portugal, Europe

Aerial of the Iguape river, Unesco site Atlantic Forest South-East Reserves, Alto Ribeira Touristic State Park, Sao Paulo state, Brazil, South America

Aerial of the Iguape river, Unesco site Atlantic Forest South-East Reserves, Alto Ribeira Touristic State Park, Sao Paulo state, Brazil, South America

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

Ribeira district, Porto, Unesco World Heritage Site, Portugal, Europe