Do you believe that the earth we live in is hollow? and that there is another advanced civilization there?
Yes, the entrance is at Antarctica. You can watch the documentary here:
https://www.youtube.com/watch?v=JKPwtDjzJMIThat's some funny shit... tell me people don't take that seriously... Hitler riding a dinosaur in the hollow Earth? LMFAO
Also, google the word "documentary"... because this is definitely not a documentary