They might not be fit for humans to swim in, but "tropical" lakes may exist on one of Saturn's moons that could harbor tiny organisms.
Scientists report Wednesday in the journal Nature that the moon Titan may have methane lakes among the dunes that pervade the tropics, the region of the moon between 20 degrees of latitude north and 20 degrees of latitude south.
Like Earth, Titan has clouds, rain and lakes, though they're made up of methane instead of water.
http://lightyears.blogs.cnn.com/2012/06/13/a-moon-of-saturn-may-have-tropical-lakes/?hpt=hp_c2