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Douro River and Ribeira district, UNESCO World Heritage Site, Porto, Portugal, Europe Stock Photo - Alamy
![Historic Centre of Oporto, Luiz I Bridge and Monastery of Serra do Pilar - UNESCO World Heritage Centre Historic Centre of Oporto, Luiz I Bridge and Monastery of Serra do Pilar - UNESCO World Heritage Centre](https://whc.unesco.org/uploads/thumbs/site_0755_0017-1200-630-20151104161524.jpg)
Historic Centre of Oporto, Luiz I Bridge and Monastery of Serra do Pilar - UNESCO World Heritage Centre
![Tourists Walking Next To Narrow Colourful Buildings with Cafes in the Historic Centre of Porto - UNESCO World Heritage Editorial Image - Image of locals, ribeira: 147626455 Tourists Walking Next To Narrow Colourful Buildings with Cafes in the Historic Centre of Porto - UNESCO World Heritage Editorial Image - Image of locals, ribeira: 147626455](https://thumbs.dreamstime.com/z/tourists-walking-next-to-narrow-colourful-buildings-cafes-historic-centre-porto-unesco-world-heritage-portugal-147626455.jpg)
Tourists Walking Next To Narrow Colourful Buildings with Cafes in the Historic Centre of Porto - UNESCO World Heritage Editorial Image - Image of locals, ribeira: 147626455
![Douro river and the historic centre of Ribeira, Porto, Unesco World Heritage, Portugal, Europe Stock Photo - Alamy Douro river and the historic centre of Ribeira, Porto, Unesco World Heritage, Portugal, Europe Stock Photo - Alamy](https://c8.alamy.com/comp/J2HRW5/douro-river-and-the-historic-centre-of-ribeira-porto-unesco-world-J2HRW5.jpg)
Douro river and the historic centre of Ribeira, Porto, Unesco World Heritage, Portugal, Europe Stock Photo - Alamy
![Porto, Portugal -21 May 2015:The Historic Centre Of Porto Was Declared A World Heritage Site By UNESCO In 1996 Stock Photo, Picture and Royalty Free Image. Image 55204131. Porto, Portugal -21 May 2015:The Historic Centre Of Porto Was Declared A World Heritage Site By UNESCO In 1996 Stock Photo, Picture and Royalty Free Image. Image 55204131.](https://previews.123rf.com/images/perszing1982/perszing19821604/perszing1982160400347/55204131-porto-portugal-21-may-2015-the-historic-centre-of-porto-was-declared-a-world-heritage-site-by-unesco.jpg)
Porto, Portugal -21 May 2015:The Historic Centre Of Porto Was Declared A World Heritage Site By UNESCO In 1996 Stock Photo, Picture and Royalty Free Image. Image 55204131.
![Ribeira District, UNESCO World Heritage Site, Se Cathedral, Palace of the Bishop, Porto (Oporto), Portugal, Europe. - Album alb3755400 Ribeira District, UNESCO World Heritage Site, Se Cathedral, Palace of the Bishop, Porto (Oporto), Portugal, Europe. - Album alb3755400](https://www.album-online.com/photos/prev/NWExOWZjMA/album_alb3755400.jpg)
Ribeira District, UNESCO World Heritage Site, Se Cathedral, Palace of the Bishop, Porto (Oporto), Portugal, Europe. - Album alb3755400
![Porto (Oporto), Portugal, Europe - January 1, 2014: Ribeira district, UNESCO World Heritage Site stock photo - OFFSET Porto (Oporto), Portugal, Europe - January 1, 2014: Ribeira district, UNESCO World Heritage Site stock photo - OFFSET](https://ak.picdn.net/offset/photos/59fb5c7617fb156e4806e6d9/large_w/offset_624385.jpg)
Porto (Oporto), Portugal, Europe - January 1, 2014: Ribeira district, UNESCO World Heritage Site stock photo - OFFSET
![UNESCO World Heritage Sign Next To Clerigos Church in the Old Town of Porto, Portugal Editorial Photo - Image of organization, sign: 209600611 UNESCO World Heritage Sign Next To Clerigos Church in the Old Town of Porto, Portugal Editorial Photo - Image of organization, sign: 209600611](https://thumbs.dreamstime.com/z/unesco-world-heritage-sign-next-to-clerigos-church-old-town-porto-portugal-porto-portugal-august-unesco-world-heritage-209600611.jpg)
UNESCO World Heritage Sign Next To Clerigos Church in the Old Town of Porto, Portugal Editorial Photo - Image of organization, sign: 209600611
![File:Unesco World Heritage Site - Walking around Beautiful Oporto (23785885331).jpg - Wikimedia Commons File:Unesco World Heritage Site - Walking around Beautiful Oporto (23785885331).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/2/2e/Unesco_World_Heritage_Site_-_Walking_around_Beautiful_Oporto_%2823785885331%29.jpg)