Feia Lacus (Titan)

Lake in Brazil.

Feia Lacus is one of a number of hydrocarbon seas and lakes found on Saturn's largest moon, Titan. It was named in 2007 on the basis of data taken by the space probe Casssini. At 47 km in length it is moderately sized. (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.