For any Game of Thrones fans, there is a must see in Seville: The Alcázar of Seville, where the show films scenes for the fictional Dorne. I went in December and even though I did not see much of the gardens, the vast gardens and beauty are undeniable. Learn it’s history, have a meal in the cafeteria and read a book in the gardens. You can easily spend two hours there.
The famous Cathedral, Catedral de Sevilla is where the son of Christopher Columbus is buried and is known to be one of the largest cathedrals in the world. It is also right next to The Alcázar of Seville.
Then go to Plaza de Espana, it is simple yet radiantly beautiful. There are canoes you can rent to around the water, pony and horse rides or you can simple walk around.
At night, be sure to go to a Flamingo dance, it is well renowned and Seville is the place to be to see one.
Seville is a relatively small city so it is worth walking around and taking your time. There is so much to see and do but these four things are a must.