Surely anything that can be learned by studying the Kabbalah can be learned through OBE to those actual places. Where do you think the ancient mystics got it from?
Kabbalah is not talking about any places at all, including mentioned tree of life. Moreover, kabbalah has nothing common with misticism and mistics. I suppose I wrote already about the method of exporing reality using by kabbalists.

If kabbalah is interesting to you, I'll try to explain in different topic what it is.