Eastern Lisbon used to be an ugly industrial area until it was chosen as the site to host the last world fair of the 20th century, Expo 98. It has since been reborn into a futuristic glass-and-steel district, home to some wonderful examples of modern architecture.
One of them is Oriente Station, a landmark with the signature of Santiago Calatrava, while Pritzker-award winning architect Alvaro Siza Vieira is the man behind the fantastic Pavilhão de Portugal, known for its remarkable undulating roof. Many of the other constructions have an ocean theme (the twin towers São Gabriel and São Rafael resemble ships and are named after two of Vasco da Gama's vessels), and there is also one of the world's most spectacular aquariums nearby.
Everywhere you turn is a glimpse of the river looking like an ocean crossed by Europe's longest bridge, water volcanos erupting, wave-shaped benches, exotic greenery, public art by Portuguese and international artists, cable cars overlooking it all, and an unashamedly avant-garde side of Lisbon contrasting with its old historic center.