PORTO Watercolor City Blocks Map: PRINTPORTO, Portugal. Explore Porto with your eyes, trace the old streets up the cliffs from the river Duoro, its small medieval blocks in the city center and its larger blocks and boulevards beyond. This is a PRINT of my original watercolor painting. The blues recall the beautiful ceramic tiles that adorn so many facades and make the streetscape an art gallery. Epson archival coated paper Epson Professional high quality inkjet printer Archival inks Color