I've talked about the unusual path of Einsten's brain after his death once before, but here is a recent article on it. It ends up out in the Midwest in a Costa Cider jar before finally being returned to the Princeton hospital where the unauthorized autopsy was performed.
http://gizmodo.com/the-theft-and-half-century-journey-of-einstein-s-brain-1682738696
http://gizmodo.com/the-theft-and-half-century-journey-of-einstein-s-brain-1682738696