National Geographic put together an illustration of the proposed and in-progress additions to the skyline superimposed with the existing cityscape. Before 2004, there were 28 skyscrapers 700 feet and taller. Thirteen have been built since then, 15 are under construction, and 19 more are proposed. Many are concentrated in Hudson Yards and near the World Trade Center, but as the infographic shows, the Empire State Building and the Chrysler Building—two of the city's most iconic silhouettes—could potentially be engulfed by their taller brethren.

While the 34 in-progress and proposed skyscrapers seem staggering, London has a whopping 230 new towers over 20 stories planned.