Savage Land
The Savage Land is a secret jungle paradise on the coast of Antarctica that is home to many monstrous, prehistoric creatures. Ratchet travelled there to retrieve the Dinobots, who had fallen there battling Shockwave 4 million years ago.
It is not, however, Dinobot Island. That's a different secret jungle paradise that is home to many monstrous, prehistoric creatures.
The Savage Land was mentioned as part of the origin of the Dinobots very early in the Marvel Comics Transformers series, during the brief period of time in which the Transformers comic took place in the main Marvel Universe. The Savage Land of the mainstream Marvel Universe first appeared in the X-Men comic in the 1960s, and is sustained by alien technology. The explanation for the existence of a jungle full of dinosaurs in Antarctica in the Transformers comic continuity is unknown, but is presumably similar.
