Sports cars get all the attention. With their sleek shapes, powerful motors, and handling prowess, the other four-wheeled denizens of the vintage automotive world often get overlooked. Vehicles made to work rarely get any praise. Even though it isn't going to get any accolades for performance or racing pedigree, this 1937 Yellowstone Park tour bus is hard to miss. Huge, yellow, and able to haul all your friends and extended family to destinations unknown, it's slightly more practical than your usual upscale car auction fodder — and has a history of showing people the grandeur of Yellowstone that's as important as any automobile.