The show is set in a whimsical prehistoric world of jungles, swamps, active volcanoes and oceans, all teeming with dinosaur and other animal life, and connected by a train line known as the Dinosaur Train. This steam-engine train can be customized for dinosaurs of all kinds: windows accommodate the long-necked sauropods, there’s plenty of headroom in the Observation Car for the larger theropods, and the Aquacar is an aquarium for sea-going passengers. The train itself is run by Troodons, as the smartest dinosaurs in this fictional universe. The Dinosaur Train circles the whole world—it even crosses the oceans and inland seas, with stops to visit undersea prehistoric animals. It can travel through the entire Mesozoic Era, the “Age of Dinosaurs”, passing through magical Time Tunnels to the Triassic, Jurassic, and Cretaceous time periods.