In 1998, Lisbon hosted the Expo 98, a world exposition that focused on the theme of "The Oceans, a Heritage for the Future." This event celebrated the importance of the oceans and showcased innovations in technology, culture, and sustainability. The exposition attracted millions of visitors and featured pavilions from various countries, highlighting their contributions to ocean conservation. The Gare do Oriente, a modern transportation hub designed by architect Santiago Calatrava, was built for the expo and remains a significant landmark in Lisbon. The event also led to the development of the Parque das Nações, a revitalized area that includes parks, shopping centers, and cultural attractions.