It isn't really invisible, of course! But this tower just next to the WTC construction site definitely is different from the surrounding buildings. I liked the way it reflected the sky, so shot this standing at the bottom.
Thanks a lot to everyone who commented on my photos, or even stopped by for a visit. The comments have been pouring in pretty fast and I'm finding it increasingly difficult to reply to each individually. I'd rather spend that time in viewing others' photos and commenting there. But I do read each comment individually, and if you ask me something specific, I'll answer that.