Sevan Lacus (Titan)
Lake in Armenia.
A lacus is a "lake" or small, dark plain with discrete, sharp boundaries. On Titan they are named after lakes on Earth, preferably with a shape similar to the lacus or lacuna on Titan.
Image Source. Marker locations are approximate and may not always appear to align with image on map.
Sevan Lacus
69.7° N 134.4° E