Looking for ideas on how to spend a Sunday afternoon (our arrival day) in Rome this winter. Rick's Heart of Rome guided walk looks about perfect in terms of getting oriented to the city (this is our first trip to Rome), getting fresh air to combat jet lag, and seeing 'free' sights given that just about everything else of importance is closed or closes early due to winter hours. Open to other suggestions!
Follow-up question: how much time should we expect to spend commuting from FCO to our hotel near the main train station? We plan to use the express train (30 minutes) to get from the airport to the train station.
Thanks!