¡Valencia!
This is an awesome city. The culture is fantastic! there's something to do for everyone. Beach, shopping, museums, history, Ancient ruins etc. If you want to go for a jog the riverbed, Jardín de Turía is a great place. You can see a great view of the city from the basilica or either of the torres, quart or serranos. Mercado central is excellent if you want to cook for yourself. And you must check out mercado colon just to see the building itself.
Insider Tip:Discotecas- cost around 10-15 euro each so only one per night is best. Mya and animas are quite popular, mya is better in my opinion but animas is at the beach so you can see the sun rise at the end of the night. La tres is also very good and the music there is better than both of the above. stores close b/t 1400 and 17/1800. restaurants close b/t 1600 and 2100, except for tapas places open around 1830 or 1900. bars from midnight- 3 am then at 3am disco time. Now that you're on the spanish schedule enjoy!