Video: Iceberg size of New York forms in Antarctica Combining digital photography and laser generated ground maps, Nasa have created a three dimensional fly through of the large crack which is running along the side of the Pine Island Glacier in west Antarctica. Once the crack reaches the bottom of the glacier, the resulting iceberg is expected to be 350 square miles in size. Manhattan, Brooklyn, Queens, Staten Island and the Bronx combined only cover 303 square miles. Pine Island, one of the largest and fastest moving glaciers in Antarctica has concerned climate scientists for years because its ice is thinning at a high rate.