At the Vent Haven Museum in Fort Mitchell Kentucky, visitors to the worlds only museum dedicated to the art of ventriloquism will see a set of tattered and weather beaten dummies who may be the only remaining witnesses to a bone-chilling crime. At the Computer History Museum in Mountain View, California, a decades-old rudimentary electronic device played a critical role in exposing and capturing one of the worlds first hacker spies. And at the International Cryptozoology Museum in Portland, Maine a plaster cast of a large and strange looking footprint may prove the existence of a ghastly creature thought only to exist in myths.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.