Something Huge is melting out of the Antarctic Ice Sheet

Something Huge located between Prince Olav Coast and Prince Haraid Coast is melting out of the Antarctic Ice Sheet. 

An enormous structure hidden under the ice sheet of Antarctica has become visible possible due to climate changes. 

The structure which is not something natural or a crack in the ice sheet is 300 meters long, width measures between 30 – 50 meters, including huge walls and a tower of 10 meters high. 

Could it be an ancient settlement, base or a shipwreck built a long time ago when Antarctica was not yet a frozen contingent or is it something extraterrestrial?

Google Earth coordinates: 69°53'40.85"S 38°42'18.25"E