1 / 19

The Tribute in Light

The Tribute in Light rises above the New York City skyline from across the East River in Brooklyn on Sept. 11, 2017, the 16th anniversary of the 2001 terrorist attacks. (Gordon Donovan/Yahoo News)

The Tribute in Light

In what has become one of the most moving — and visible — 9/11 memorials, two giant pillars of light near where the World Trade Center’s twin towers once stood were turned on in lower Manhattan this week to mark the 16th anniversary of the Sept. 11, 2001, terrorist attacks.

Assembled on the roof of the Battery Parking Garage south of the 9/11 Memorial, the twin beams reach up to four miles into the sky and are comprised of 88 7,000-watt xenon light bulbs positioned into two 48-foot squares, echoing the shape and orientation of the Twin Towers.

On the anniversary of 9/11, the Memorial Plaza is open to the public from 3 p.m. to midnight for the viewing of Tribute in Light. The installation can also be viewed from a 60-mile radius around lower Manhattan.

Photography by Gordon Donovan/Yahoo News

Related Slideshows: 
Photos: 9/11: Then and now – 16 years later »
Photos: Remembering 9/11 on the 16th anniversary of terrorist attacks »
Interactive Photos: Iconic 9/11 images: 16 years later »

See more news-related photo galleries and follow us on Yahoo News Photo Twitter and Tumblr.