The Mosteiro da Serra do Pilar sits atop of hill in Porto with picturesque views of the Douro River and the entire city. The monastery started construction in 1538, but it wasn’t until 1670 that it was completed. The monastery is currently undergoing renovations, but most of it is open for viewing. There is a small entrance fee, but its only a few Euros.
I do think its worth a visit to the monastery to at least witness the beautiful views of the city.
I’ll just let the pictures speak for themselves.