I've wondered about that over the years as well.
Not sure if different "dimensions" exist per se, since those are a fabrication of modern physicists that ultimately leads back to, believe it or not, the rejection of geocentrism. And it's an attempt to explain the fact that our existence is statistically impossible ... without there being a God. I don't want to open that can of worms here, but see the movie The Principle.
Is it hidden spiritually? Was it wiped out after the flood? We'll find out these and so many other things when we pass over into eternity.