Great Lakes (Ardani)
The Great Lakes were fictional lakes located on the planet Ardani, created by Thaddeus Troi-Riker.

They were located on the coast of the Northeastern Continent, which was the homeland of the Viveen. 

Even after the death of her son, Deanna Troi kept the drawings of the maps of Ardani, one of which had detailed the Great Lakes. ()
Fictional locations
Bodies of water