Grand Canyon South Rim Bus Tour with Optional Upgrades. Sit back and relax as your coach driver takes you on a narrated journey from Las Vegas to the South Rim of the Grand Canyon. You can upgrade your tour to include discounted tickets to the incredible IMAX footage of the canyon at the National Geographic Visitor Center on the only South Rim bus tour that makes a stop at the center. Book and Save 44% Off Grand Canyon South Rim Bus Tour with Optional Upgrades.