Train to Coimbra the medieval capital.
https://www.lonelyplanet.com/portugal/central-portugal/coimbra
This is not a multiple day town. The main parts and an overview of the university can be seen in several hours.
Today Coimbra is a somewhat poor city on a nice river.
The university is high on a hill reached by windy small cobbled streets and alleys. One first reaches a lovely church which maintains the medieval design of no Gothic arches.
The architecture of the entrance to the university looks much like Hampton Court. Currently there are 23K students in what is billed the oldest European university.
Special for Judi: a king cake Portuguese style.
Boog's Blog 
Lovely pastries!! The train looks quite clean and spacious.