I took this picture a few years ago on a trip to Rhode Island. I didn't know what it was until I looked it up afterwards. This is the Wall of Hope, located at 1 Financial Way in Providence, RI. Elementary school children made tiles for this mosaic wall, in remembrance of 9/11/01. I'll be posting more pictures to show different angles and closeups of the tiles.
Here's a close-up of some of the tiles:[link]