Rhino Rally is a theme park attraction at Busch Gardens Africa, and it's included with admission like any regular ride or show. It is an off-road safari adventure similar to Kilamanjaro Safaris at Animal Kingdom, but Rhino Rally is smaller in scale. The driver also acts as a guide, and the experience varies greatly depending upon the driver's ability to entertain riders. I've ridden four times, and once the driver was hilarious, another was great but much more serious in tone, another was terribly boring, and another was a happy medium of all those. You will pass by elephants, cape buffalo, some sort of small deer, flamingos, rhinos, crocodiles, etc. The animal portion of the ride is much smaller than the one at Animal Kingdom, but I felt more up close with some of the animals.
The second half of Rhino Rally is what makes the ride stand out, entertain, and surprise in my opinion. The vehicle stalls out on a pontoon bridge, then a rush of water washes out the bridge and the vehicle goes floating down a river, narrowly missing a waterfall. The traveling pontoon bridge stops when it hits another washed out and fallen bridge down the river and the driver finally gets the vehicle restarted and can drive off.
If one strictly compares Rhino Rally to Kilamanjaro Safaris, then Rhino Rally will always come up short in many people's opinion because it's smaller in scale, shorter in duration, and exhibits less animals, but I enjoyed it immensely for what it is, and the water ride aspect made it unique.
Busch Gardens Africa also offers Safari Tours on their Serenghetti Plain for an additional fee of about $30. In this upcharge experience visitors are taken by a large truck out into the plain to feed and interact with animals on a grander scale. I believe this experience lasts about 30 minutes.