Moon of Saturn planet. Hi-res textures. With PBR methane oceans.
From wiki:
Titan is the largest moon of Saturn and the second-largest natural satellite in the Solar System. It is the only moon known to have a dense atmosphere, and the only known body in space, other than Earth, where clear evidence of stable bodies of surface liquid has been found.
More about here: https://en.wikipedia.org/wiki/Titan_(moon)