New Savannah was the home planet of the Catkind, located in the M87 Galaxy. As the name suggested, it was covered in savannahs. These savannahs were unproductive, and without the help of the New Earth Empire, the Catkind would have been doomed to starvation. (COMIC: Agent Provocateur)
New Savannah was not only the home to the Catkind, a wolf-like species called the Sabrewolves also inhabited it. The Sabrewolves were carnivorous, and killed the Catkind to eat them. (TV: The God Complex)
The Doctor once met Ayesha in the milk vats of New Savannah. (PROSE: Fairy Tale of New New York)