Explore the ornate Manueline monastery and cloisters, a UNESCO site; arrival early helps avoid lines (opens 10:00 for church but cloisters often accessible).
Visit the striking riverside museum for contemporary exhibits and great rooftop photo opportunities; open typically 11:00–19:00 (check ahead for exact hours).
One of Europe's top aquariums with a massive central tank and diverse marine life; opens around 10:00—arrive for opening where possible (check exact opening time).
Vibrant food hall offering many top chefs and varied Portuguese dishes—easy for groups and final-night tasting of multiple specialties; open until late.