The original World Trade Center was a complex with seven buildings featuring landmark twin towers in Lower Manhattan

Lower Manhattan

Lower Manhattan is the southernmost part of the island of Manhattan, the main island and center of business and government of the City of New York...

, New York City

New York City

New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. The complex opened on April 4, 1973, and was destroyed in 2001 during the September 11 attacks. The site is currently being rebuilt with five new skyscrapers and a memorial to the casualties of the attacks. , only one skyscraper has been completed

7 World Trade Center

7 World Trade Center is a building in New York City located across from the World Trade Center site in Lower Manhattan. It is the second building to bear that name and address in that location. The original structure was completed in 1987 and was destroyed in the September 11 attacks...

, with four more expected to be completed before 2020. One World Trade Center will be the lead building for the new complex and is expected to be finished by 2013.