- "We've been living above an entire world, and we didn't even know it!"
- ―Ellie after she entered the Dino World[src]
The Dinosaur World is a vast perfectly preserved Mesozoic jungle, located underground. It is the main setting of most of the third movie.
The translucent ice ceiling is supported by rocky pillars that stand as high as skyscrapers. There are waterfalls and forests full of cycads that were similar to the appearance of ferns and palm trees, which were common in the Mesozoic era. The light coming down on the jungle was caused by the sun that shone through the thick layers of ice up above. In other words, it was as bright as daylight. It is also very warm, like a mild rainforest. Apparently this is where Dinosaurs and other Mesozoic inhabitants escaped to in order to survive the K–T event. The Dinosaur World's most common inhabitants are dinosaurs (From both the Jurassic and Cretaceous period) , birds such as Archaeopteryx have also been shown to be native here.
Buck is the only known mammal living in the Dinosaur World, however it is possible that there might be mammals from the Mesozoic era that are native to the Dinosaur World. If there are (which is perhaps very likely that there are, since mammals did exist during the age of dinosaurs), then it is clear that Buck has not met with any of these native mammals.
|Human camp • Dodo camp • Stonehenge • Ice cavern • Half Peak • Glacier Pass • Human settlement|
|Glacier Water Park • Eviscerator • Campo de Sid • Mammoth Tree • Misty Chasm • Mini-sloths' camp • Boat|
|Ice Cavern • Playground|
|Skeleton Bridge • Jungle of Misery • Chasm of Death • Plates of Woe • Lava Falls • Momma's Cave|
|Grand Canyon • Last Oak Tree Memorial • North Pole|