I don't know what is left of the Expo '92 site, but anyway there is so much to see. The cathedral and La Giralda tower are not to be missed. The Andalucian architecture is remarkable. We travel in time when walking through the narrows streets of the old Jewish Quarter.
Quick Tips:
Fast speed trains link Sevilla to Madrid, but as they are expensive, I took a regular one in a overnight trip. Spain is a country that has so much to offer. While in Andalucia, don't miss also Granada and Cordoba. For more information and images, check my Travel Notes:
http://www.geocities.com/TheTropics/4363/travnote/Best Way To Get Around:
I went around mostly foot. A bus was necessary to get to the Youth Hostel.