For a change of pace (and to catch your breath), consider using buses, trams, the metro and elevators. One word of caution: Lisbon's Tram 28 and the Santa Justa Elevator double as attractions ...

However, bringing comfortable walking shoes and a good map are good ideas regardless ... and the area's grand Oceanarium (Lisbon Aquarium). Several bus lines, including 5, 25, 28, 44 and 708 ...