One World Trade Center (also known as 1 World Trade Center, One WTC and 1 WTC; the current building was dubbed the "Freedom Tower" during initial basework) refers to the main building of the new World Trade Center complex in Lower Manhattan, New York City. It is the tallest skyscraper in the Western Hemisphere, and the fourth-tallest in the world. The 104-story supertall structure shares a numeric name with the northern Twin Tower of the original World Trade Center, which was destroyed in the terrorist attacks of September 11, 2001. The new skyscraper stands on the northwest corner of the 16-acre (6.5 ha) World Trade Center site, on the site of the original 6 World Trade Center.