Who built this underwater base 600 km off the coast of Antarctica?
The base is approximately 700 x 500 meters with a solid structure of approximately 320x320x160 meters on top.
The base also includes a landing platform, porthole, and building structure below the landing platform.
Could there be a connection between this base and the unexplained UFO activity around and over Antarctica?
Coordinates: 72°2'38.19"S 162°55'41.45"W