If there was ever going to be a Sports Betting Hall of Fame, there are a few pieces of memorabilia that would serve as the facility’s cornerstones. It would want a betting slip from when Donerail won the 1913 Kentucky Derby as a 91-to-1 underdog — the longest shot to win in the race's history. Maybe organizers would throw in a seat from the Hilton, the whiteboards from the Stratosphere, or a mound of cigarette butts from just about any casino in town. The most famous item in sports betting history, as you might suspect, is located in Las Vegas. It's not in a sportsbook, though. It's tucked away on the 39th floor of the Planet Hollywood Resort & Casino. And even if you did end up grabbing it, you would need a DeLorean and Doc Brown to make much use of it.