Douro is a fantastic place that deserves a long visit. For those who like nature and wine, such as myself, it is highly recommended.
The Pousada de Mesao Frio is, like other Pousadas de Portugal, an old building renovated and in perfect condition, but keeping the historical features.
The pool and in particular the view from the pool is absolutely fantastic.
The rooms are very spacious, comfortable and clean.
I just wished I could have stayed longer.