The Parque das Nações
If you've spent enough time among the cobblestone streets and 19th-century architecture of Baixa and central Lisbon, the Parque des Nacões might come as a shock. This area which stretches along the Tagus estuary northeast of the city center, was totally redeveloped for Lisbon's 1998 World Expo, and is defined by its modern pavilions, parks and attractions.