I traveled solo (74) last May 1-10 to Portugal, beginning in Lisbon, 5 days and 4 days in Porto. I stayed in Oeiras just N of Lisbon, and rode the Cais do Sodre regional train into the city 3 days and one day the other direction to Cascais on a Sunday afternoon, which was delightful. If you are in the Alfama area for lunch, make an effort to eat at Augusto, (12e), the best avocado toast you will ever eat., address Rua Santa Marinha 26, small pink bldg, it’s worth the wait! In Belem, the Jeronimos monastery was half price for seniors and not to be missed, it is amazing. the train Lisbon to Porto was 24 E for first class, a 3 1/2 hr train ride. Uber is cheap and I met some of the nicest Uber drivers. In Porto I would strongly urge you to Google for lunch, Honest Greens, great food and all organic (12e). Also I’m embarrassed to say I ate dinner 3 nights at Conga which was very close to my Airbnb, BECAUSE, they had $3 delicious Bifana sandwiches and homemade soups. I was early, but by the time I left it was packed. If you are going to the Lello bookstore in Porto, you need tickets, which I didn’t know, but I made up for it eating gelato at the place next door, it was very good. From my journal, Observations about Portugal: tons of optical and shoe stores, lots of mom and pop shops in Porto, dinner is late, people are helpful, anyone under 40-45 speaks English. I have no recollection of being uneasy or frightened. I wasn’t out after dark in Lisbon. Someone mentioned the Pink Street, I walked by it around 7:00 pm, but could see that wasn’t a place for me. I did record that after walking on cobblestones for 8 hrs a day my legs were killing me. In closing, I’m actually somewhat of a scaredy cat, so I’m very cautious and aware of my surroundings. I am returning April 15, so all was well last year. Have a great trip!