There's plenty of evidence that the Lord will lead His faithful elect to places of refuge, which He will divinely protect. Everyone who believes Matthew 24 wants to know where they will be, but not everyone is right with the Lord. Only those who have a correct relationship with Him will be led to His refuges. So there's nothing to be gained by speculation about the Ozarks, there could be one there later, but probably not. Even if so, it's probably going to be near the size of a football field, not the size of several mountains. I know where 4 will be, but the only one I can tell is Delta, Utah, USA. Before the great tribulation ends, many thousands will have made their way there. Going will mean leaving behind your home, friends, and electronics.