One World Observatory

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==Top of the World Observation Deck==
===1975–2001===
The One World Observatory was originally inaugurated in 1975 as the Top of the World Observation Deck, which were two public viewing areas located on the 107th floor and the roof of the South Tower (2WTC) of the original World Trade Center complex. The observation deck was destroyed along with the building in the September 11 attacks.
==One World Observatory==
===2015–present===
A new observatory was opened on May 29, 2015 at the One World Trade Center.
==See also==
*One World Trade Center
*World Trade Center
*Windows on the World
*Marriott World Trade Center
*National September 11 Memorial & Museum
Category:9/11
Category:Buildings
Category:1975
Category:2014