Last night, the powerful Tribute in Light installation returned to mark the anniversary of the September 11th, 2001 attacks. Located atop a parking garage a few blocks from the World Trade Center, the lights—comprised of 88 7,000-watt lights—turned on at sunset and faded away into this morning's sky.

The lights, designed by John Bennett, Gustavo Bonevardi, Richard Nash Gould, Julian Laverdiere, Paul Myoda and lighting designer Paul Marantz for a Municipal Art Society and Creative Time project, were first illuminated on March 11, 2002, to mark the six-month anniversary. "Gradually they materialized: two soaring towers of light, defiantly piercing the night sky from the wounded western stretch of Lower Manhattan. These luminous ghosts, created by the strategic positioning of 88 high-powered searchlights, were the final tribute in a series of public efforts yesterday to remember what hardly had been forgotten," the NY Times' Dan Barry wrote.

The lights have become so beloved, an ethereal and elegant reminder of our loss and hope for better, that they have returned every year, thanks to the Municipal Art Society, which organized Tribute until 2011, and the 9/11 Memorial and Museum.

The Daily News got a look at what goes into putting together Tribute:

And WABC 7 has a look from inside the lights—it's a 360-degree panoramic photo:

And there's something very peaceful about looking at the Tribute in Light with a soundtrack of crickets: