The Three Sisters are an island group in the Maingulf that separates the south-eastern Three Rivers from Stanov. The are three tall volcanic peaks that form an east-west line at the southern end of the Maingulf. The westernmost one has a harbour, and this is frequently used by pirates as a safe haven, though their activities are often kept in check by the navy of Jelotnar and Tarxiu. The Three Sisters form an effective barrier to any travel between the Maingulf and the Strait of Pyre.
All three are rocky and covered in tough grasses and scrub.