Gnolaria

 Gnollaria is the kingdom containing the Gnolls. It is small, but still large. It is full of volcanoes and pollution. Inside it is the capital of the Gnolls, Eruptis, and inside is Gnollgoore's tower. It also contains places like the Artic Peninsula, The Burning Chasam, The Shifting Sands, The Magma Fields, etc.