The on-again, off-again speculation about liquid methane on Titan seems to be on again. The surface pressure is half again that of Earth's, which I think means you'd need lots (and lots) of insulation and a life support system, but not a pressure suit in order to walk around down there.

Of course, considering we haven't ventured to the Moon in nearly forty years, going all the way to Saturn might be a bit of a stretch. Still, fun to think about.