A Google Maps user posted a series of images showing a huge Monolith apparently located at an unknown point near the San Martín Antarctic Base or San Martín Base, a scientific station of the Argentine Republic in Antarctica under the responsibility of the Antarctic Command of the Argentine Army.
The structure of great proportions would be located on the Barry or San Martín islet of the group of Debenham islets, in the Motteta pass of the Fallières coast, in the Margarita Bay of the Antarctic peninsula.
The San Martín base is the first human settlement south of the Antarctic Circle.
The "monolith" appears to actually be a glitch in the 360 image stitching, as the wooden pole behind the camera is missing part of its top and the wood grain and color appears to match that of the pole.