The South Tower of the World Trade Center in New York City was completed in 1973 at a height of 415 m (1362 feet). The address of this building was "Two World Trade Center". It was destroyed along with the North Tower in the September 11, 2001 attacks. The South Tower was the second tower to be struck and the first tower to collapse. At the top of this tower was a popular tourist observation deck and a disused helipad.

Companies with offices in World Trade Center South (2 WTC) on September 11, 2001:

Note: Floor numbers in  red  are part of United Airlines Flight 175's impact area.