The World Trade Center site , formerly referred to as " Ground Zero " or "the Pile" immediately after the September 11 attacks , is a The previous World Trade Center complex stood on the site until it was destroyed in the September 11 attacks. The western portion of the World Trade Center site was originally under the Hudson River, with the shoreline in the vicinity of Greenwich Street. On this shoreline close to the intersection of Greenwich Street and the former Dey Street, Dutch explorer Adriaen Block 's ship, the Tyger , burned to the waterline in November , stranding Block and his crew and forcing them to overwinter on the island. The remains of the ship were buried under landfill when the shoreline was extended starting in , and were discovered during excavation work in The remains of another ship from the eighteenth century were found in during excavation work at the site.
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From the clear blue morning sky to the smell of fire and the sound of sirens, New Yorkers witnessed firsthand the events of that day. Even now, they can recall the moments of tragedy and the acts of heroism that tested, and ultimately strengthened, our city. It is difficult to understand their historical significance without context. Limited tickets available.
In relation to nuclear explosions and other large bombs , ground zero also called surface zero  is the point on the Earth's surface closest to a detonation. Generally, the term "ground zero" is also used in relation to earthquakes , epidemics , and other disasters to mark the point of the most severe damage or destruction. The term is distinguished from the term zero point in that the latter can also be located in the air, underground, or underwater. The origins of the term "ground zero" began with the Trinity test in Jornada del Muerto desert near Socorro, New Mexico , and the atomic bombings of Hiroshima and Nagasaki in Japan. The United States Strategic Bombing Survey of the atomic attacks, released in June , used the term liberally, defining it as: "For convenience, the term 'ground zero' will be used to designate the point on the ground directly beneath the point of detonation, or 'air zero. The Oxford English Dictionary , citing the use of the term in a New York Times report on the destroyed city of Hiroshima , defines ground zero as "that part of the ground situated immediately under an exploding bomb, especially an atomic one. The open space in the center of the Pentagon became known informally as ground zero.