One World Observatory The One World Observatory is the latest and greatest Big Apple attraction. Located at the top three floors of the One World Trade Center, which is now the tallest building in the western hemisphere, the observatory boasts jaw-dropping views of Manhattan and its surrounds. With our admission ticket, you'll have access to all three Observatory floors for a memorable experience that offers fabulous photo ops, New York City history, and dining options to buy food or drinks high in the sky. 9/11 Memorial Museum The mission of the 9/11 Memorial Museum, located at the World Trade Center site, is to bear solemn witness to the terrorist attacks of September 11, 2001 and February 26, 1993. The Museum honors the nearly 3,000 victims of these attacks and all those who risked their lives to save others. It further recognizes the thousands who survived and all who demonstrated extraordinary compassion in the aftermath. Demonstrating the consequences of terrorism on individual lives and its impact on communities at the local, national, and international levels, the Museum attests to the triumph of human dignity over human depravity and affirms an unwavering commitment to the fundamental value of human life.