We talked about Lincoln Park yesterday in the comments. I like this piece a lot, and not just because you can frame a tree with it. I like how the neighborhood rises beyond it, like its reason for being there.
If you turn around you see it's part of a larger artwork, The Wall las Memorias, the first publicly funded AIDS monument in the nation.

I don't know, do you call this art or architecture? Good architecture is art, after all. Maybe I should have put this in the architecture post from the other day. I like it a lot.
This mural has several panels. Karin posted another part, where the artists included pictures of themselves painting the mural. The whole thing is witty that way. I love how in this panel the artists incorporated the night deposit box as our hero's footrest.
I took a picture of the artist's signatures or I'd never remember that the mural was done in 1977 by Los Dos Streetscapers, David Botello and Wayne Healy, and renovated in 2006 by Paul Botello.