Hello -- 15 nights solo in Portugal - I like art, architecture, museums, walking in cities, people watching - not so much a hiker.
Here's my Itinerary - starting in Porto, ending in Lisbon. I decided to omit the Algarve because it seems mostly beach-y and I'm not interested in the beach. All comments and suggestions welcome.
1 fly into Porto
2 Porto
3 Porto
4 Porto - day cruise on Duoro and train back
5 rent car, drive to Coimbra
6 Coimbra
7 Obidos -- after drive to Fatima, Batalha
8 Obidos - visit Nazare and Altobaca
9 Sintra - drive early to Evora, continue to Sintra, return car
10 Sintra
11 train to Lisbon - 5 nights in Lisbon