I'd only accept travels to the past. I've a long list of persons whose faces and figures I'd like to see, and a long list of persons with riddles in their lives I'd like to solve. Principially Jesus is on the top of both lists, but in his case I'd find it difficult to yield to my desire of finding out "how it really was". Else I go with Vudija.
Four stars only, because I'd have to be prepared for seeing horrible things.