Sionascaig Lacus (Titan)

Lake in Scotland.

Sionascaig Lacus is one of a number of hydrocarbon seas and lakes found on Saturn's largest moon, Titan. The feature is named for the Earth lake, Loch Sionascaig, in Scotland. (wikipedia entry)

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.