Marvao is an amazingly striking village in Alentejo.
Bus from Portalegre but be careful! It may not be direct and the destination sign on the front of the first bus may not be what you are told! Ask drivers at the appropriate time.
Walkable - it is also possible to walk to Castelo de Vide.
It's worth just strolling round the village itself but the main sight has to be the castle, a boy's dream.
Pensio D. Dinas near to the castle - fabulous views - very friendly.