The attraction was in the opening day roster of the park, and has remained open and largely unchanged in theme and story since then. The original plan was to use real animals, but the animals would have been sleeping during the day. Aside from alterations and maintenance changes, four completely new show scenes have been added to date. In 1994 the river channel was rerouted to make way for the queue buildings and entrance courtyard of the Indiana Jones Adventure.
While the current version and most previous instances have made use of a comedic spiel, filled with intentionally bad puns, the original intent of the ride was to provide a realistic, believable voyage through the world's jungles. Until 1962, the original spiel had no jokes and sounded much like the narration of a nature documentary.
Set sail for high adventure in Asia, Africa and South America during a guided tour of the world's most remote rivers.