Aire Spa: have a dip / massage at the original ancient baths

Royal Alcázar: go to the Alcázar to soak up some culture. It's the royal palace, still in use by the Spanish royal family. If you're a Game of Thrones fan, you'll recognise the backdrop to quite a few scenes (You’ll need to book, queue looks long but goes very quickly)

Horse and cart: walk / horse & cart around the Parque de María Louisa and visit Plaza de España

Flamenco dancing: watch live flemenco dancing and grab a drink at La Carboneria or Lola de los Reyes. Check their website for schedule. (Carboneria is cash only)

Scoot! Seville is super easy to get around, and they also have stylish electric scooters you can hop on and get around easily. Download the app Yego and scoot away!

Walk around the river (the Guadalquivir) between the two bridges "Puente de Isabel II" (also called "Puente Triana") and "Puente San Telmo"…  See/visit the Torre Del Oro (Gold Tower) where Seville used to store all the gold it took in taxes from trade routes. Could also stop for a snack / drink in Mercado Lonja.