World Trade Center (Exterior), 9/11 Memorial Pools, The Sphere, The Oculus Center 

This is a basic walking tour of the areas described in the title.
See the links below for more information.
9/11 Memorial Pools
www.google.com/search?q=9%2F1...
The Sphere: The Sphere is a monumental cast bronze sculpture by German artist Fritz Koenig that sat in the World Trade Center courtyard and although damaged, survived the 9/11 attack.
www.google.com/search?q=the+s...
Oculus Center
www.google.com/search?q=oculu...
One World Observatory
www.google.com/search?q=One+W...
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