Also known as the Feline Jungle, this rainforest contains a huge amount of old ruins, many of the temples dedicated to old Bast gods. It also contains Gaia's Navel, the location of Terra, goddess of the Earth, and Yggdrasil, the World Tree.
The Southern Rainforest spans across a third of the southern border of Equestria, and is the home of many different and unique creatures, including several kinds of massive spiders and large predators. During the fall of Discord's rule, many of his followers fled deep into the rainforest, building several large temples in his name, one including his sealed son.