Another Hollow Earth Entrance. It's hard to find some of these things because everything is "painted".

Coordinates:
#1
66°36'14.70"S, 99°43'11.11"E

#2
66°33'13.75"S, 99°50'24.84"E

Try in High Quality:
http://www.youtube.com/watch?v=DirMYyERmVI&fmt=18