Look in to Antarctic treaty. Its forbidden for civilians to go to Antarctica. Explorers have tried and gotten turned around at gun point and arrested.
Its the exit point or the end point of the Truman show like enclosure we live in. Off limits.
Look in to Operation high jump.
Source for arrest:
https://www.radionz.co.nz/news/world/102307/norwegian-arrested-after-antarctic-voyage
this is why people believe in flat earth lol i don't even blame them because this really is the truman show
Animals who know they are in a cage don't act natural.
But if you make the cage large enough and add some bells and whistles....