This 7 minute, one-way ride deposits guests at Rafiki's Planet Watch, which provides a backstage look at the animal care operations center and conservation programs at Disney's Animal Kingdom. 

The Wildlife Express is a clever one sided open view train that focuses your view on the side of the track Disney wants you to see.  If you are in the back row of the train however, you can peer through the slats to see the back side of the animal kingdom. There's not much to see there really but it is amusing how imagineers created an attraction to allow for maintenance areas and the like to remain "hidden."