Tash's Country

Tash's Country is the place where all species are sent to if they reject Aslan by committing evil acts in life. It is a dark, dismal place for its denizens, and it is where Tash himself rules. It is plausible that beings such as Ginger, Rabadash, Miraz, Lady of the Green Kirtle, and other such people, including Jadis herself, were placed in this country.

Note
It should be noted that C.S. Lewis clearly depicted Tash's Country to be the Narnian version of Hell. The polar opposite of Heaven is Hell, and C.S. Lewis clearly states that the opposite of Aslan's Country is Tash's Country.