Expo 98

Expo '98 was an official specialised World's Fair held in Lisbon, Portugal from Friday, 22 May to Wednesday, 30 September 1998. The theme of the fair was "The Oceans, a Heritage for the Future," chosen in part to commemorate 500 years of Portuguese discoveries. The Expo received around 11 million visitors in 132 days, while 155 countries and organizations were represented.
The area chosen for the Expo '98 was a 5 kilometres (3.1 mi)-wide strip that covered 50 hectares (0.19 sq mi) in Lisbon's east-end alongside the Tagus river.
Expo '98 was fully built from scratch. Every building was pre-sold for after-Expo repurposing thus ensuring that, after the Expo closed, the site would not be left semi-abandoned, as had happened with previous expos, particularly Seville Expo '92.

To support the expected influx of visitors, an extensive access program was devised, including:
a new bridge across the river, the Vasco da Gama Bridge (then the longest in Europe)
a new line along the Lisbon Metro, with seven stations (five of which were ready for opening day) a new main multi-modal terminal, featuring trains, metro, buses, and taxis, called Gare do Oriente,
by architect Santiago Calatrava.