I saw that somebody mentioned the Phrygian Scale, which is a great choice for a Spanish sounding scale. That scale is based off the third mode of Major.
There is another scale though often referred to as the Spanish/Jewish scale. It's formally called the Phrygian Major scale and it's based off the 5th mode of Harmonic Minor.
What you do- take a Phrygian scale that you already know, and raise the third note a half a step. That'll give you the Phrygian Major scale. Or if you want to think about it this way- it has a lowered second, lowered 6th, and a lowered 7th. Whereas the Phrygian scale has a lowered second, LOWERED THIRD, lowered 6th, and lowered 7th.
