Where all the dead cats hang out. Prey is plentiful, and all cats sleep together out under the stars. The real stars, the burning balls of gas billions of miles away. There is no real need to sleep, though.
When an evil cat dies, he or she does not go to StarClan. Instead, the cat's soul goes to the Dark Forest to stay forever in solitude. On occasion, an evil cat's spirit may appear in the Echo Basin to the living.