Extraterrestrial liquid water
The Gliese 581 planetary system contains multiple planets that may be candidates for surface water, including Gliese 581c, Gliese 581d, might be warm enough for oceans if a greenhouse effect was operating, and Gliese 581e.
List of largest lakes and seas in the Solar System
Listed below are the largest lakes and seas on various worlds in the Solar System. The table includes single bodies of water or other liquid on or near the surface of a solid body (terrestrial planet, planetoid, or moon). All objects on this list are expected to be round, hence anything that is part of a belt or disc is expected to be a dwarf planet.