Wander narrow lanes up to Lisbon Cathedral and Miradouro de Santa Luzia for tiled facades and river outlooks; area is free to explore (cathedral donation optional).
Choose MAAT (modern art/architecture) or Berardo (contemporary art) for 1–2 hours of modern exhibits; both typically open 10:00–19:00 (verify exhibits).
If back in Lisbon, choose a neighborhood restaurant near your hotel; if in Sintra, select a cozy local spot offering regional dishes (most restaurants open evenings).
If time permits, visit MAAT or the Gulbenkian collection for more art; check opening times (usually 10:00–18:00) before heading to airport or train station.