Primeval World

Railroads are a common feature of the Disney theme parks.  Not only do they allow guests to avoid walking get from one part of the park to another, they also offer the chance to see the various lands from a different vantage point.  At points, these railroads pass through indoor areas.

In Disneyland, one of these areas has a diorama entitled Primeval World - a display of dinosaurs in their natural habitat based on the Rite of Spring sequence from Fantasia.

Various animatronic dinosaurs are positioned in lush jungles, waterfalls, rocky outcrops and other scenes.  There are diplodocus, pteranadons and triceratops.  

The final scene echoes the film segment with a ferocious battle between a stegosaurus and a tyrannosaurus rex in front of a raging volcano.

There is a similar scene on the railroad at Tokyo Disneyland.