Outlands

The Outlands is a forbidden area of the Pride Lands and is the lair of the hyenas and Vultures.

The Outlands are seen as a deep gorge, where the light does not reach. The skeletons of other unfortunate animals, possibly some former residents of the Pride Lands, can be seen. Going further into the Outlands leads to a volcano with more desolate surroundings, including withered trees.

In The Lion Guard: Return of the Roar
It was implied in Return of the Roar that Simba had forbid Kion go to the Outlands. When Bunga and Kion's Baobab fruit fell down into the Outlands, Kion refused to go. However, Bunga leapt down there regardless, not worrying about the consequences. After reclaiming the Baobab fruit, he encountered two hyenas, Cheezi and Chungu, one of which grabbed him by the fur on his neck. Kion was able to use the Roar of the Elders to shock them into letting Bunga go.

When Kion was getting the Lion Guard together, a vulture named Mzingo overheard the news and flew deeper into the Outlands to relay the message to Janja.