Seville was a vibrant city, with people everywhere. It's main 'touristy' features are a cathedral and a fort, but I found the university building and the park much more interesting. I stayed in my first hostel with much success in sleeping.
We saw a fountain:
Eric also slept in the park:
Córdoba had much less "life" in it but still had its charm. We saw a torture museum, walked around a lot, and had some Spanish Tortillas. Our hostel was a 'shared' room, but we had it all to ourselves, so we slept quite well.
Garden in a Castle:
Here's the Mosque in the background: