20 places across Lisbon, Porto and 5 more cities — ranked by traveler ratings, with photos and where to find each one.
The Praça do Comércio, more commonly known in Portuguese as Terreiro do Paço, is a large, harbour-facing plaza in Portugal's capital, Lisbon, and is one of the largest in Portugal, with an area of 175 by 175 m (574 by 574 ft), that is, 30,600 m2 (329,000 ft2).
The Luiz I Bridge, commonly known as Dom Luís I Bridge (Ponte de Dom Luís I), is a double-deck metal arch bridge that spans the river Douro between the cities of Porto and Vila Nova de Gaia in Portugal. At its construction, its 172 metres (564 ft) span was the longest of its type in the world.
The Lisbon Oceanarium is an oceanarium in Lisbon, Portugal. It is located in the Parque das Nações, which was the exhibition grounds for the Expo '98. It is one of the largest indoor aquariums in Europe and approximately 1 million people visit each year.
Belém Tower, officially the Tower of Saint Vincent, is a 16th-century fortification located in Lisbon, Portugal, which served as a point of embarkation and disembarkation for Portuguese explorers and as a ceremonial gateway to Lisbon. The tower symbolizes Portugal's maritime and colonial power in early modern Europe.
Quinta da Regaleira is a quinta constructed from 1904 to '10 and located near the historic centre of Sintra, Portugal. It is classified as a World Heritage Site by UNESCO within the "Cultural Landscape of Sintra".
São Jorge Castle, sometimes known in English as Saint George's Castle, is a historic castle in the Portuguese capital of Lisbon, located in the freguesia of Santa Maria Maior.
The Monument of the Discoveries is a monument on the northern bank of the Tagus River estuary, in the civil parish of Santa Maria de Belém, Lisbon.
The Sanctuary of Bom Jesus do Monte is a Portuguese Catholic shrine in Tenões, outside the city of Braga, in northern Portugal. Its name means Good Jesus of the Mount.
Edward VII Park is a public park in Lisbon, Portugal. The park occupies an area of 26 hectares to the north of Avenida da Liberdade and Marquis of Pombal Square in Lisbon's city center.
The Palace of Sintra, also called Town Palace, is located in the town of Sintra, in the Lisbon District of Portugal. It is a present-day historic house museum.
The Porto Cathedral is a Roman Catholic church located in the historical centre of the city of Porto, Portugal. It is one of the city's oldest monuments and one of the most important local Romanesque monuments.
Photos from Wikimedia Commons, used under Creative Commons licenses. Individual credits shown on each photo where available.