I think you mean the blues "Box" ... it's famous licks or cliches in Blues or Rock music ... Since you play pentatonic I'm sure you do a lot of it in the Box , but you just don't know it. ;)

For learning new scales, try learning the modes of the Major/Minor , Harmonic min , Melodic min first and the Harmony theroy of chords and arpeggios .

If you already know these , you may like to experience some exotic scales ... I recomend the Double Harmonic as a start , it has a very cool Egyptian taste... Japanese , Gipsy & Hindu scales are very cool too.