When the journey continues, the train goes across another access road and enters a tunnel containing the Grand Canyon Diorama followed by the Primeval World Diorama. As the train runs alongside the Grand Canyon Diorama, the main theme from "On the Trail", the third movement of Ferde Grofé's "Grand Canyon Suite", can be heard; and as the train runs alongside the Primeval World Diorama, music from the 1961 film "Mysterious Island" can be heard. Shortly after leaving the tunnel, the train arrives back at Main Street, U.S.A. Station, completing what the park refers to as "The Grand Circle Tour".