The Jurassic Jungle (also known to be called Primal Preserve and Saurian Swamp) is a Prime World biome filled with a Dinosaur infested Jungle. It exists in any Adventure Worlds leveled Uber 4 or higher and can appear in either small patches or massive chunks of land. Meteorite Fragments can only be obtained here.
Different mobs will spawn depending their location. Enemies that roam this biome include dinosaurs such as Archeosaurus, Therizinosaurus and Triceratops and occasionally tribal inhabitants such as apes, birds and frogs. The Tyrannosaurus Rex has a chance to spawn rarely in this biome and will always have a Buff and a large amount of health, making it a formidable opponent.