There are several cities and places close to Lisbon worth your visit
In addition to sightseeing in Lisbon, spare some time to discover the surroundings of the city. Sintra, Cabo da Roca, Cascais and Estoril are but a few kilometres away either by car or public transport. Setúbal might be a little further, but it is nonetheless an excellent city to have lunch in.
Sintra
It takes but 40 minutes to get to Sintra by train. This charming green town has several attractions. The main one is the Pena Palace, but you can also visit the Moorish Castle, Palácio da Vila, Monserrate Palace, Quinta da Regaleira and Convento dos Capuchos. Besides these monuments, the town of Sintra is very beautiful and is full of interesting nooks and passageways. Stop at Piriquita to grab a travesseiro or a queijada, very typical delicacies.
Cabo da Roca
It is the westernmost point of Europe and it was described by Camões, the famous Portuguese writer, as the place "where the land ends and the sea begins" (in the LusÃadas, Canto VIII). It is integrated in the Natural Park of Sintra Cascais, which covers a vast area of Nature . Cabo da Roca will offer a magnificent view of the sea. This place has great tourist traffic and it is easily accessible.
Cascais
Cascais is a town by the sea, situated between the Atlantic Ocean and the Serra de Sintra, which is an important tourist destination. With inviting beaches, water sports, a rich historical and cultural heritage, a majestic landscape and nightlife, Cascais has everything to please anyone who stays there. Take a walk along the seawall that runs from São João do Estoril to Cascais, visit the historic center of Cascais and its typical streets and stop to admire the beauty of Cascais Bay.
Estoril
It was called the "Portuguese Riviera", as Estoril was the place where the wealthy and famous escaped to during the 2nd World War. At that time, large hotels and the largest casino in Europe were built in Estoril. There are good beaches like Tamariz, as well as great mansions, world-class golf courses and a car racing track.
Setúbal
Setúbal is located 30 to 40 minutes from Lisbon and to get there, cross 25 de Abril or the Vasco da Gama bridges. In Setúbal there are several tourist attractions, such as the huge green park of Arrábida, Cristo Rei in Almada, the beaches of Costa da Caparica, Sesimbra, Portinho da Arrabida, Tróia and much more. It is also worth knowing that Setúbal has a strong culinary identity. Try the typical fried cuttlefish and cheese of Azeitão.