People,
If you can't get into the opening to see what the hollow earth is like, and who is in it, if you can at least look around the opening to see if there is anything that would give you a clue, then at least you have made some progress. Olaf Jansen reported that the hollow earth inhabitants "look just like us". So if we just take a look at the Scandanavians and Russians, we can at least find out what the hollow earthers look like.
There are Vedic culture artifacts in northern Russia, and the orifice seems to be right above the New Siberian Islands, so what does this tell us?