We will be going to Portugal for the first time at the end of August beginning of September. Planning on 3 nights in Porto and Lisbon. Also want to go to he Algarve. My wife and I are in our late 60;s, good shape but don't like to hang out on a beach. Looking for ideas on which town we should stay at and for how long. Will not be renting a car, so traveling by train and willing to hire driver for short trips.
For reference here is a link to our trip report describing what my wife and I (similar age) did during a 10 night trip to Portugal in Aug 2023. We travelled by train, staying in Porto (4 nights, which included 1 night to help recover from jet lag), Lisbon (4 nights), and Coimbra (2 nights). (We had initially planned to visit the Algarve but dropped it.)