What building is commonly referred to as "The Flatiron"?

The Flatiron refers specifically to the Flatiron Building, which is one of New York City's most iconic structures. Completed in 1902, the building is noted for its unique triangular shape that resembles a cast-iron clothing iron, hence the name "Flatiron." Its distinct architectural style and location at the intersection of Fifth Avenue and Broadway have made it a beloved landmark and subject of numerous photographs and artworks.

In contrast, the other buildings listed do not share this nickname. The Empire State Building, for instance, is known for being one of the tallest and most recognized skyscrapers in the world, while the Chrysler Building is celebrated for its Art Deco design and spire. The Woolworth Building, another historical skyscraper, is known for its Gothic architecture. Each of these buildings has its own unique identity, but none are referred to as "The Flatiron."