Ruiz is the sister world to Shem, a very similar planet, albeit slightly smaller. She has one moon, Oro, home to an asterian colony.During the time of the Twinned Worlds campaign, she is colonized extensively by the Shemmish.

Continents:
Wahuinuik: home mostly to the northwestern Ruizano tribes
Gamnu: home mostly to the mindless vischarg beetle-people
Kareuil: a vast, open realm where the settlers seek homes
Highrock: a massive mountain jutting from the seas in the east, home to none
Temnoch: a series of islands dominated by massive chasms into the subterranean realm
Xarun: the southern continent, a ruins of smoking volcanoes and crags
Ospose: the gateway continent where all settlers first arrive
Quenyem: the semi-civilized realm where Ruizano tribes and settlers mix
Irosquim: a land home to the southern Ruizano tribes
Zytan: dominated by the Kemblan Empire, an empire controlled by Nu Corp
Nalene: home of the Lost Runners

Oceans:
Northern Ocean: a large, frigid ocean in the north
White Ocean: the frothing ocean between Zytan and Wahuiniuk
Daldane Ocean: the large central ocean
Kareuilean Ocean: the large eastern ocean
Broken Seas: the southern ocean around Xarun
Ruby Sea: the vast ea between Irosquim, Quenyem, and Ospose
Zeren Ocean: the ocean between Zytan and Irosquim
Western Sea: a sea off the west coast of Wahuiniuk

Subterranean:
The Rim: the world around the rim of the crust's lower reaches, upside down utterly, where the Contradictors live