The Harmonic Minor Scale
This is a common variation on the natural minor scale, which contains a natural 7th degree. Widely found in classical music and jazz; also a staple sound of widdly neo-classical rock. Often used in its 5th mode - the Phrygian Dominant Scale - to negotiate dominant V chords in a minor key.
Below are 5 CAGED-style patterns that are commonly used. I've included some suggested fingerings, as it can be a bit awkward with this particular scale. Download a high-quality PDF here, which also allows you to see the fingering numbers a bit more clearly.