There’s another Lake Ontario – on Titan!

Ontario Lacus is a lake composed of methane, ethane and propane near the south pole of Saturn‘s moon Titan. Its character as a hydrocarbon lake was confirmed[1] by observations from the Cassini spacecraft, published in the 31 July 2008 edition of Nature. Ontario Lacus has a surface area of about 15,000 square kilometers (5,800 sq mi), about 20% smaller than its terrestrial namesake, Lake Ontario in North America. In April 2012, it was announced that it may be more like a mudflat or salt pan.[2]

https://en.wikipedia.org/wiki/Ontario_Lacus
This RADAR-image of Ontario Lacus, the largest lake on the southern hemisphere of Saturn’s moon Titan, was obtained by NASA’s Cassini spacecraft on Jan. 12, 2010.