Expo 98, officially known as the 1998 Lisbon World Exposition, was a world's fair held in Lisbon, Portugal from May 22 to September 30, 1998. The theme of the exposition was "The Oceans, a Heritage for the Future," highlighting the importance of the oceans in global ecology and culture. The event attracted over 11 million visitors and featured pavilions from various countries, showcasing innovations and cultural exhibits related to maritime themes. The site of Expo 98 was located in the Parque das Nações, a revitalized area along the Tagus River. Key attractions included the Oceanário de Lisboa, one of the largest aquariums in the world, and the Gare do Oriente, a major transportation hub designed by architect Santiago Calatrava. The exposition played a significant role in the urban development of Lisbon and left a lasting legacy in the area.