@kanttiadvanture, it depends on the amount of time you have to visit the country and if you are more interested in the culture or in the scenery. I'm from the North, from Ponte de Lima and it seems you are going south following the coast. You should definetely visit Oporto and the Douro Valley (N222 is a bit of a detour but the views are amazing). Along the coast you also have Aveiro with a visit to Costa Nova to photograph the colorful houses. If you are further south, I would visit Nazaré (to see the World's biggest waves) Óbidos, spend at least 2~3 days in Sintra...