The Oculus contains two underground floors, which house part of the Westfield World Trade Center mall.
The transportation hub connects the various modes of transportation in Lower Manhattan, from the Fulton Center in the east to the Battery Park City Ferry Terminal in the west, and includes connections to various New York City Subway stations.
It is the fifth-busiest transportation hub in the New York metropolitan area.
The main floor always has art exhibits or musical performances while bustles with commuters, shoppers, and visitors.
There is also weekly programs including farmers markets and retail events.
The structure’s orientation serves as a lasting reminder of the attacks of September 11th, 2001.
It is in alignment with the sun’s solar angles on each September 11th, from 8:46 am, when the first plane struck, until 10:28 am, when the second tower collapsed.
Its central skylight fits this alignment and opens on anniversaries of the attack, washing the Oculus floor with a beam of light.