Seville is a really pretty but HOT place to go in the summer time. Most people from there like to go on holiday during the few hot summer months because it’s get really hot and humid. We still managed to walk around and see some of the sites in Seville. There is a metro system but we never even had to use it because we stayed with someone on couchsurfing that had a pace right in the center of town. Everything is pretty much walking distance when you’re in the center.
The Plaza de España is definitely something you have to see. You can rent a boat for 5 euros for 35 minutes and ride around in front of the Plaza de España.
The Cathedral is beautiful and is lit up at night. You can go up to the top and get a view of the city.
On the side of the river you can check out the Naval Museum.
Right next to where we were staying was the Metropol Parasol. Go there to get a good view of the city up top or go to one of the restaurants down below.
When you are anywhere in Spain you have to try the Paella, a rice dish with different kinds of fish or meat in it. Or go somewhere to have tapas and Sangria. Mondatitos is a super cheap tapas restaurant that is all over Spain that has special tapa and beer deals on certain days of the week.