A mysterious anomaly is discovered in Antarctica

Browsing through the pictures of Antarctica in Google Earth, in the middle of the ice is visible quite a large area free from water and surrounded by ice. It is interesting that in the center of the polynya is visible perfectly round object, slightly above and to the left on the edge of this area visible round notch, ka like an object left a round hole at the edge of the ice.

It is worth noting that around the abnormal area,all covered with ice and there is only a small area free from ice and it is here, are there two abnormal structures.

Here are the Google Earth coordinates: 74°35’39.74