Travel from one spacetime to another?

[Dremmer]

I was wondering if such could be possible in the future, to travel from one spacetime to another (if other spacetimes exist)?

 

[Drakkith]

There is no evidence that any other spacetime other than our own exists. Trying to speculate past that is pretty pointless.

So in other words, no, there is no way that we know of to travel between spacetimes.