What are the twin towers?

The World Trade Center is dedicated on April 4. January 1974. U.S. Customs Service moves into Six World Trade Center. August 1974. Tightrope artist Philippe Petit performs an unauthorized walk between the Twin Towers on August 7. December 1975. Top of the World Observation Deck opens at Two World Trade Center (South Tower). read more

The original World Trade Center in March 2001. The tower on the left, with antenna spire, was 1 WTC. The tower on the right was 2 WTC. All seven buildings of the WTC complex are partially visible; refer to map below. The red granite-clad building left of the Twin Towers was the original 7 World Trade Center. In the background is the East River. read more

The iconic twin towers of downtown Manhattan’s World Trade Center were a triumph of human imagination and will. Completed in 1973, the towers stood at 110 stories each, accommodating 50,000 workers and 200,000 daily visitors in 10 million square feet of space. read more