![PORTO, PORTUGAL - MAY 24, 2018: Old Town street in Porto, Portugal. Porto is the 2nd largest city in Portugal. Its old town is a UNESCO World Heritage Stock Photo - Alamy PORTO, PORTUGAL - MAY 24, 2018: Old Town street in Porto, Portugal. Porto is the 2nd largest city in Portugal. Its old town is a UNESCO World Heritage Stock Photo - Alamy](https://c8.alamy.com/comp/2A2CXAP/porto-portugal-may-24-2018-old-town-street-in-porto-portugal-porto-is-the-2nd-largest-city-in-portugal-its-old-town-is-a-unesco-world-heritage-2A2CXAP.jpg)
PORTO, PORTUGAL - MAY 24, 2018: Old Town street in Porto, Portugal. Porto is the 2nd largest city in Portugal. Its old town is a UNESCO World Heritage Stock Photo - Alamy
![Scenic view of the Porto Old Town pier architecture over Duoro river in Porto, Portugal Stock Photo - Alamy Scenic view of the Porto Old Town pier architecture over Duoro river in Porto, Portugal Stock Photo - Alamy](https://c8.alamy.com/comp/P38NTW/scenic-view-of-the-porto-old-town-pier-architecture-over-duoro-river-in-porto-portugal-P38NTW.jpg)
Scenic view of the Porto Old Town pier architecture over Duoro river in Porto, Portugal Stock Photo - Alamy
![Panorama Old City Porto At River Duoro, Oporto, Portugal Stock Photo, Picture and Royalty Free Image. Image 10426181. Panorama Old City Porto At River Duoro, Oporto, Portugal Stock Photo, Picture and Royalty Free Image. Image 10426181.](https://previews.123rf.com/images/mlehmann78/mlehmann781108/mlehmann78110800035/10426181-panorama-old-city-porto-at-river-duoro-oporto-portugal.jpg)
Panorama Old City Porto At River Duoro, Oporto, Portugal Stock Photo, Picture and Royalty Free Image. Image 10426181.
![Porto city guide: How to spend two days in Portugal's second city | The Independent | The Independent Porto city guide: How to spend two days in Portugal's second city | The Independent | The Independent](https://static.independent.co.uk/s3fs-public/thumbnails/image/2017/06/26/18/porto-main.jpg)