Book in advance for a chance to upgrade to a one-night Yellowstone National Park cabin, immerse yourself in the lake and mountain scenery, and savor Yellowstone's romantic sunrises and sunsets. | Free upgrade to a five-diamond hotel on the Las Vegas Strip for two nights, an influencer-favorite pool photo spot, and the city's hottest shops, making your trip truly worthwhile. | On select itineraries, the Las Vegas round-trip itinerary segment includes a special upgrade to a 32-seat luxury first-class bus.