A true gem
Located in the "fregusia de São Nicolau" next to the banks of the Douro River, it's part of the historic district of Porto and considered a World Heritage Site by UNESCO. The "Cais da Ribeira" is one of the oldest squares in the city and stands out due to the brightly-colored hold homes clustered around the banks of the river. A true gem of traditional Portuguese architecture.
Nowadays, the area is a bit touristy, with lots of bars, restaurants, and hotels. Highlights are the "Praça da Ribeira", "Rua da Fonte Taurina", and the "Bacalhoeiros y la Casa do Infante" where Prince D. Henrique was born in 1394.