Click image to view larger. 4.5” x 5.7” inches (11.5 x 14.5cm) ink on Hemp and Recycled paper $20
I saw this on the river walk as well although it got covered in snow before I could get a good picture of it. So I had to reconstruct it from memory and the not so good photo. But that being said it has come out fairly close to what I envisioned. I think it's some kind of heat vent at the bottom of an apartment building.