Take an exhilarating speedboat ride to the dolphin-watching area off the Cascais coast. There’s magnificent city views in addition to the potential to see pods of bottle-nose dolphins of 20 or more in their natural habitat. Like many visitors to Portugal, they are very fond of the local sardines.
CGPS: 9.42176 38° 41′ 50″ N, 9° 25′ 18″