Is there any difference between "into" and "to the inside of" in this particular context? I understand that "into" and "to the inside of" don't have the same meaning in all contexts, but I was wondering if they did in certain context. I found that "into" and "to" can be used to indicate the destination of the action "migrate", but I am wondering when I can use "into" and if it's synonymous to "to the inside of". If not, how are they different?
He migrated into the cave on the hill.
He migrated to the inside of the cave on the hill.