The Missouri History Museum in St. Louis contains a set of twenty-nine bound volumes, each one containing hauntingly beautiful writing that was allegedly dictated from beyond the grave. The Smithsonian National Air and Space Museum in Washington, DC has on display the taxidermied body of a famous primate, who once played a pivotal role in America's earliest forays into space exploration. And at the Museum of American Cocktail in New Orleans, Louisiana, visitors can find a bottle containing a drink that is said to have caused madness, hallucinations, and a passion for violence in those who consumed it.For even more Mysteries at the Museum, head to discovery+. Go to discoveryplus.com/mystery to start your 7-day free trial today. Terms apply.