If, as many people say, time does not exist in the afterlife -- at least not in a linear fashion -- then I don't see why you wouldn't be able to see primordial earth, ancient Egypt, and pioneer America. In my opinion, being able to visit other planets and galaxies is probably even more likely, as it only involves travel in space, not time.
I don't know if it's possible for us to create actual universes, but who knows. I do think it might be possible for us to create facsimiles or simulations of planets or universes, though, just without real living beings in them (because we are not god/s).